Rescue part of wicket before being dismissed (7)
I believe the answer is:
bailout
'rescue' is the definition.
'part of wicket before being dismissed' is the wordplay.
'part of wicket' becomes 'bail' (I've seen this before).
'before' is a charade indicator (letters next to each other).
'being dismissed' becomes 'out' (I've seen this before).
'bail'+'out'='BAILOUT'
(Other definitions for bailout that I've seen before include "Rescue from difficulty or secure release from prison" , "action rescuing business" , "Make an emergency jump from plane" , "Rescue with financial help in emergency" , "Escape from airplane" .)