Safari attire (4)
I believe the answer is:
vest
'safari attire' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for vest that I've seen before include "Undershirt, singlet" , "An American man's waistcoat" , "Undergarment for vets" , "Clothe in ecclesiastical garments" , "Undergarment for upper body" .)