Fifteensquared

A very pleasing puzzle, even when solving at 4am! A minor quibble with 17a but otherwise some enjoyable clues. Unusually for me the first run through generated no definite grid entries but the second pass was more fruitful (perhaps I was a little more awake by then   A quick scan of my archive revealed that we only see this setter occasionally which is a pity judging by today’s offering.

Across
9 SIMPATICO  *(TOPIC AIMS)
10 APPLE  cd – cooking and custard are types of apple. Bakeapple is the fruit of the cloudberry but I am sure I have heard a reference to baking apple (I certainly had baked apple, stuffed with sultanas, as a youngster) but this is not supported in any of the standard references so far as I can see.
11 GENESIS  GENES (one’s inheritance) IS (one’s)
12 RIB CAGE  cd
13 SON  [mai]SON (house, in French)
14 ORIGINAL SIN  cd
17 THETA  hidden in ‘impatienT HE TAlked’ – I cannot see the containment indicator, surely it cannot be ‘about’
18 TAU  A in TU (you, in French)
19 NAKED  K (week end) in DEAN reversed
21 CONSECRATED  *(CONES) CRATED (boxed up)
23 NOH  NO (negative) H (hard)
25 OBSERVE B (black) in *(EVER SO)
27 BOMBARD  MB (doctor) in BOARD (directors)
28 INERT  IN (at home) [leav]E [afte]R [breakfas]T
29 NET INCOME  cd

Down
1 V-SIGNS  V[isible] SIGNS (indications)
2 EMINENCE  MINE (pit) in [f]ENCE (barrier)
3 PASSIONATE  AS (when) SION (Israel) in PATE (head)
4 TIES  TI[m]ES
5 TOURNIQUET  TOUR (trip) N (north) *(QUITE)
6 GARB  R (right) in GAB (talk)
7 SPEARS  PEAR (fruit) in SS (ship)
8 DEMEANED  MEAN (intend to) in DEED (property transfer)
15 INTERREGNA  N (point) in *(A TREE RING)
16 ANNO DOMINI  *(NINA IN MOOD)
17 TECTONIC  TEC (investigator) TONIC (fillip)
20 KANGAROO  cd
22 NOSIER  SON (13a) reversed IE (that is) R (right)
24 HIDDEN  HI (homophone of ‘high’, lofty sounding) DD (theologian) E N (points)
26 RITE  IT in RE (about)
27 BUTT  BUT (certainly not) T[hinking]