Utilised (4)
I believe the answer is:
used
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">utilised</span>' is the definition.<br/ ><span class="explanation-format__explanation">('use' can be a synonym of 'utilise')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for used that I've seen before include "Put to a purpose" , "Not fresh" , "Hand-me-down" , "Pre-loved" , "Dog-eared" .)