Solutions to THC # 9211 (back in the game)

Across

 1 Happened fortuitously for the new engineer to be in Chad (7) CHANCED [cha n ce d]

 5 Call at public house for gymnastic exercises (7) BARBELL [bar bell]

 9 Henry resides in a nice appropriate place (5) NICHE [nic H e]

10 A melancholy old schoolmaster might put his capital into them (4,5) BLUE CHIPS

11 Steer many out to perform a bone surgery (6) RESECT [steer c]

12 They do not take one’s own, but others’ issues (8) ADOPTERS

14 Son returns quarter of loaded cargo (5) LADEN [son=lad + quarter=north-east/ne returned]

15 Nearly set wrong in a serious way (9) EARNESTLY [nearly set]

18 Lost at sea? (3,6) OFF COURSE

20 Men from city holidaying out west (5) DUDES

22 Standard ideas revised in Garden of Eden (8) PARADISE [standard=par + ideas]

24 Engineer accepts different role for the West Indian of Mixed Spanish blood (6) CREOLE [ce role]

26 I dealt one to myself at just the right moment (5,4) IDEAL TIME [i dealt one/i myself/me]

27 Eyed impertinently at the French with the dog around (5) OGLED [le dog]

28 Support America having stain all over (7) SUSTAIN [us stain]

29 General pardon for little woman brandishing Sten (7) AMNESTY [amy sten]

Down

 1 As a vocalist she’s low in the register (9) CONTRALTO

 2 Charge brought against Bill by many employed by him (7) ACCUSED [ac c used]

 3 Sound increase in score displayed round about the finish (9) CRESCENDO [score c end]

 4 Many bet foolishly only to be in obligation (4) DEBT [d bet]

 5 Sure sign they’ll be big hits (10) BOUNDARIES

 6 Briefly go over the main points (5) RECAP

 7 Noteworthy pit surrounded by another ten (7) EMINENT [mine ten]

 8 Fails to be successful (5) LOSES

13 Unhappiness caused by a slump (10) DEPRESSION [slump/unhappiness]

16 Duck below the bedcover (9) EIDERDOWN

17 The past twentyfour hours (9) YESTERDAY

19 They are the agriculturists (7) FARMERS

21 Scribbles but does included old camouflage (7) DOODLES [does old]

22 Rises quietly in order to peep into something private (5) PRIES [rise p]

23 A Greek letter on alluvial deposit at the river mouth (5) DELTA

25 I’m at South American flat topped hill (4) MESA [me SA]