Cry of pain in uncovered horse-drawn carriage (8)
I believe the answer is:
barouche
'horse-drawn carriage' is the definition.
(I've seen this before)
'cry of pain in uncovered' is the wordplay.
'cry of pain' becomes 'ouch' (exclamation said when in pain).
'in' indicates putting letters inside.
'uncovered' becomes 'bare' (similar in meaning).
'ouch' put into 'bare' is 'BAROUCHE'.
(Other definitions for barouche that I've seen before include "Four-wheeled carriage" , "Horse-drawn carriage - Cuba hero (anag)" , "Victorian carriage" .)