Rest record in flower (6)
I believe the answer is:
repose
'rest' is the definition.
(I know that rest can be written as repose)
'record in flower' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'in' is an insertion indicator.
'flower' becomes 'rose' (I've seen this before).
'ep' placed within 'rose' is 'REPOSE'.
(Other definitions for repose that I've seen before include "Rest - tranquillity" , "Lie at rest" , "peace" , "calm" , "Quiet restfulness" .)