Dicky reviles fawning (7)
I believe the answer is:
servile
'fawning' is the definition.
(thesaurus)
'dicky reviles' is the wordplay.
'dicky' indicates anagramming the letters (dicky can mean ill or non-functioning).
'reviles' is an anagram of 'SERVILE'.
(Other definitions for servile that I've seen before include "Cringing, fawning" , "Reviles, being slavish" , "Reviles for being obsequious" , "grovelling" , "Menial, excessively submissive" .)