Happy and relaxed after record return (7)
I believe the answer is:
pleased
'happy' is the definition.
(synonyms)
'relaxed after record return' is the wordplay.
'relaxed' becomes 'eased' (I've seen this before).
'after' says to put letters next to each other.
'record' becomes 'L-P' (abbreviation for long play record).
'return' shows that the letters should be reversed in order.
'lp' reversed gives 'pl'.
'eased' after 'pl' is 'PLEASED'.
'and' is the link.
(Other definitions for pleased that I've seen before include "Glad" , "Feeling satisfaction" , "Well satisfied" , "Euphoric" , "like Punch?" .)