Tanned skin -- it's ecstasy in soapy water (7)
I believe the answer is:
leather
'tanned skin' is the definition.
(I've seen this before)
'ecstasy in soapy water' is the wordplay.
'ecstasy' becomes 'E' (informal term for the drug).
'in' indicates putting letters inside.
'soapy water' becomes 'lather'.
'e' put within 'lather' is 'LEATHER'.
'it's' acts as a link.
(Other definitions for leather that I've seen before include "Beat" , "Morocco, perhaps" , "Animal skins" , "calf" , "kid, say" .)