Halfhearted (5)
'halfhearted' is the definition.
(I know that halfhearted can be written as tepid)
This is the entire clue.
(Other definitions for tepid that I've seen before include "without passion" , "lacking enthusiasm" , "Slightly warm" , "Of liquid, luke-warm" , "Unenthusiastic - cool" .)
'halfhearted' is the definition.
(synonyms)
This is all the clue.
(Other definitions for lukewarm that I've seen before include "Little enthusiasm" , "Not enthusiastic, neither hot nor cold" , "Tepid, or less than enthusiastic" , "Not very keen" , "Moist" .)