Barman's wife in bed? (6)
I believe the answer is:
Here is my best explanation:
'barman's' is the definition.
(I've seen this before)
'wife in bed?' is the subsidiary indication.
'wife' becomes 'w'.
'in' indicates putting letters inside.
'bed?' becomes 'layer' (bed is a kind of layer**).
'w' placed within 'layer' is 'lawyer'.
(Other definitions for lawyer that I've seen before include "Legal adviser", "Solicitor, for example", "One gives legal advice", "Man at the bar?", "Legal eagle", "Legal expert", "Advocate", "Barrister", "court worker" and "Legal representative".)