Tempted by rum used about December (7)
I believe the answer is:
seduced
'tempted' is the definition.
(seduction is a type of temptation)
'rum used about december' is the wordplay.
'rum' is an anagram indicator (rum can mean strange or unusual).
'about' says the letters should be written in reverse.
'december' becomes 'Dec' (synonyms).
'dec' backwards is 'ced'.
'used' with letters rearranged gives 'sedu'.
'sedu'+'ced'='SEDUCED'
'by' is the link.
(Other definitions for seduced that I've seen before include "Beguiled" , "Someone attracted to a belief" , "Led astray" , "Lured -- enticed" .)