Across
1 Something to investigate – for a dog? (1,4,2,4) A BONE TO PICK
9 One of a pair that may be involved in many a blow (7) NOSTRIL
10 Everyone overwhelmed by striking sound is wearisome (7) PALLING
11 Bear to see ruler caught by American after American (5) URSUS
12 What one is when the last page in a daily calendar is torn off (3,2,4) OUT OF DATE
13 Pants in island near Naples (5) CAPRI
15 Finally, none to follow (4,2,3) LAST OF ALL
18 Inactive, making little impression in various years (9) SEDENTARY
21 Many spoil the amulet (5) CHARM
22 Of late, low turnout fetches absolutely negligible number (3,3,3) ALL TOO FEW
24 Girl entertains appeal from Angolan party (5)
26 Good, in France, a New Zealand ace gets a windfall (7) BONANZA
27 Rani romps around me with primarily thin clothing (7)RAIMENT
28 Spread some gossip about woman and learners being untidy (11)DISHEVELLED
Down
1 Gives the word to the woman about big cats (9)ANNOUNCES
2 Dispossesses nothing: America is on way up (5)OUSTS
3 Departure from backsliding doesn’t begin (9) EGGRESSION
4 There’s lot of petroleum there underground (3,4)OIL POOL
5 I am to set up a different version of driving force (7) IMPETUS
6 Religious leader, fatherlike, leaves there in a quandary (5) KALIF
7 Great eminence his small outing on peninsula fetches (8)
8 Five get release from non-specific fever (4) AGUE
14 Cudgelling prince’s disorientation (8) PIDDLING?
16 Serving to close, Officer Commanding gets sole former wife dismissed (9)
17 Criticised for having botched up medals tab (9) LAMBASTED
19 A female’s string of words said to cause violent disturbances (7) AFFRAYS
20 A churchyard sight in England, yet we’re puzzled (7) YEWTREE
22 Sailor and engineer meet Parisian cleric (4) ABBE
23 Held title to a section of downtown edifice (5) OWNED
25 One compromise turns out to be perfect (5) IDEAL