Make use of (4,4)
'make use of' is the definition.
(synonyms)
This is all the clue.
(Other definitions for utilise that I've seen before include "Find application or task for" , "Put into service, find application for" , "Employ, do something with" , "Put to use" , "Employ, make use of" .)
'make use of' is the definition.
(eg to draw upon experience is to use it)
This is the entire clue.