Sweat (8)

I believe the answer is:
perspire
'sweat' is the definition.
(I know that sweat can be written as perspire)
This is the entire clue.
(Other definitions for perspire that I've seen before include "Show effect of heat" , "Swelter" , "Sweat politely" , "for every shoot" , "Sweat (as a lady does?)" .)