Insignificant man lion mauled (7)
I believe the answer is:
nominal
'insignificant' is the definition.
(as in a nominal fee)
'man lion mauled' is the wordplay.
'mauled' indicates anagramming the letters.
'man'+'lion'='manlion'
'manlion' anagrammed gives 'NOMINAL'.
(Other definitions for nominal that I've seen before include "Ostensible" , "Theoretical - token" , "So-called, but not in reality" , "So called" , "Insignificantly small - token" .)