Tepid (8)
I believe the answer is:
lukewarm
'tepid' is the definition.
(I know that tepid can be written as lukewarm)
This is all the clue.
(Other definitions for lukewarm that I've seen before include "Rather cool" , "Unenthusiastic" , "Somewhat cooler!" , "Little enthusiasm" , "Not enthusiastic, neither hot nor cold" .)