Swimwear (6)
I believe the answer is:
trunks
'swimwear' is the definition.
(I know that trunks is a type of swimwear)
This is all the clue.
(Other definitions for trunks that I've seen before include "Men's swimsuits on an elephants?" , "Men's swimsuit" , "Parts of trees and elephants" , "Swimming garments or tree stems" , "Swimming shorts" .)