Celebrity cuddling large lover (5)
I believe the answer is:
flame
'lover' is the definition.
(thesaurus)
'celebrity cuddling large' is the wordplay.
'celebrity' becomes 'fame' ('fame' can be a synonym of 'celebrity').
'cuddling' is an insertion indicator.
'large' becomes 'l'.
'fame' enclosing 'l' is 'FLAME'.
(Other definitions for flame that I've seen before include "Burning gas from fire" , "Light; (old) love" , "abusive comment" , "Brilliant orange-red" , "Evidence of fire" .)