Trouser part of Greek attire is raised (4)
I believe the answer is:
take
'trouser' is the definition.
(trouser can mean to steal)
'part of greek attire is raised' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'is raised' is a reversal indicator.
'ekat' is hidden in the letters of 'greek attire'.
'ekat' written backwards gives 'TAKE'.
(Other definitions for take that I've seen before include "Seize; purloin" , "Accept, receive" , "Receive; subtract" , "Approach" , "Subtract; assume" .)