Hitches a ride, revealing dress (4)
I believe the answer is:
sari
'dress' is the definition.
(sari is a kind of dress)
'hitches a ride revealing' is the wordplay.
'revealing' says the answer is hidden in the clue.
'SARI' is hidden in the letters of 'hitches a ride'.
(Other definitions for sari that I've seen before include "Asian dress" , "Traditional dress of Indian women" , "Indian robe" , "Traditional Indian women's dress" , "Hindu female garment" .)