Moisten while roasting (5)
I believe the answer is:
baste
'moisten while roasting' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for baste that I've seen before include "Pour hot fat over (meat)" , "clobber" , "Pour hot oil on to cook" , "Sew" , "Drizzle with fat" .)