Recalled moment amidst endless leisure or vacation (6)
I believe the answer is:
'vacation' is the definition.
'recalled moment amidst endless leisure' is the wordplay.
'recalled' says the letters should be written in reverse.
'moment' becomes 'sec'.
'amidst' is an insertion indicator.
'endless' means to remove the last letter.
'leisure' becomes 'rest' (I've seen this before).
'sec' reversed gives 'ces'.
'rest' with its last letter taken off is 'res'.
'ces' put into 'res' is 'RECESS'.
'or' is the link.
(Other definitions for recess that I've seen before include "Nook for a break from business" , "Adjourn, rise" , "When Parliament is not sitting" , "A niche or a temporary business break" , "Temporary break from work" .)