Loves an anagram to unravel (5)
I believe the answer is:
solve
'unravel' is the definition.
(thesaurus)
'loves an anagram' is the wordplay.
'an anagram' indicates an anagram.
'loves' anagrammed gives 'SOLVE'.
'to' is the link.
(Other definitions for solve that I've seen before include "Work out (a problem)" , "Complete crossword" , "Unravel (a problem)" , "Unscramble" , "Find the key - work out" .)