Temptation to take sweetheart on one's holiday (7)
I believe the answer is:
leisure
'holiday' is the definition.
(thesaurus)
'temptation to take sweetheart on one's' is the wordplay.
'temptation' becomes 'lure' (lure is a kind of temptation).
'to take' is an insertion indicator (inserted letters are taken in).
'sweetheart' becomes 'e' (the heart/centre of 'sweet').
'on' means one lot of letters go next to another.
'one's' becomes 'i's' (Roman numeral).
'e'+'is'='eis'
'lure' going around 'eis' is 'LEISURE'.
(Other definitions for leisure that I've seen before include "Rest, relaxation" , "Time available for ease and relaxation" , "time-off" , "Time when not working" , "Enjoyment of free time" .)