1a productive vessel for tomato seeds (7) --o----
8a share in frustrations (5) --t--
9a where to sit down for a wash (4,5) ----/c-a--
11a good hug o'brien got out of nice guy next door (4,9) --o-/neighbour
16a joining the sheep produce (8) ---t----
1d car kept covered by a dagger, perhaps (7) ------w
3d part of head on second colour (5) ----n
4d little creature eating fast, we hear (6) ----i-
5d striking resemblance, it seems (8) m---h---
7d posh house in westminster (5) l----
12d against worker i add (4) ---i
23d fictional detective puzzle (5) --b--