Wife in bed with solicitor (6)
I believe the answer is:
lawyer
'solicitor' is the definition.
(I know that solicitor can be written as lawyer)
'wife in bed' is the wordplay.
'wife' becomes 'w' (abbreviation).
'in' is an insertion indicator.
'bed' becomes 'layer' (I've seen this in another clue).
'w' going into 'layer' is 'LAWYER'.
'with' acts as a link.
(Other definitions for lawyer that I've seen before include "court worker" , "Legal specialist" , "Solicitor, for example" , "Solicotor or barrister" , "Man at the bar?" .)