Shameful bishop out of bed? In bed! (7)
I believe the answer is:
corrupt
'shameful' is the definition.
(thesaurus)
'bishop out of bed? in bed' is the wordplay.
'bishop' becomes 'rr' (abbreviation for Right Reverend).
'out of bed?' becomes 'up' ('up' can be a synonym of 'out of bed').
'in' indicates putting letters inside.
'bed' becomes 'cot' (cot is a kind of bed).
'rr'+'up'='rrup'
'rrup' placed into 'cot' is 'CORRUPT'.
(Other definitions for corrupt that I've seen before include "base" , "doctor" , "Evil or morally depraved" , "Willing to act dishonestly in return for personal gain" , "Dishonest, depraved" .)