Liberal is a little flexible (7)
I believe the answer is:
lissome
'flexible' is the definition.
(thesaurus)
'liberal is a little' is the wordplay.
'liberal' becomes 'l' (abbreviation).
'a little' becomes 'some' (I've seen this before).
'l'+'is'+'some'='LISSOME'
(Other definitions for lissome that I've seen before include "pliable" , "Lithe; nimble" , "Oil mess (anag)" , "Thin - supple - graceful" , "flexible" .)