Stuck on the last eight, for some reason or another - suspect not seeing the obvious being one reason.
one is completely isolated :
19A - Company's inadequate analyst finally going west (5)
T?O?P
The remainder are interlinked in two groups, so help with one in each may lead me to the solution :
12D - Solvent northern Buddhist type invested in working party (7)
B???E?E
&
31D - Peer's heading off men after Sun's beginning to reveal sleaze (7)
S???L??
As usual one or two of these letters may be subject to correction from wiser heads.