Snatch outlandish garb (4)
I believe the answer is:
grab
'snatch' is the definition.
('grab' can be a synonym of 'snatch')
'outlandish garb' is the wordplay.
'outlandish' is an anagram indicator.
'garb' with letters rearranged gives 'GRAB'.
(Other definitions for grab that I've seen before include "Grasp roughly" , "Seize suddenly" , "Take quickly" , "interest" , "Seize roughly" .)