Cold fan in plant (6)
I believe the answer is:
clover
'plant' is the definition.
(clover is a kind of plant)
'cold fan' is the wordplay.
'cold' becomes 'c' (eg on taps).
'fan' becomes 'lover' ('lover' can be a synonym of 'fan').
'c'+'lover'='CLOVER'
'in' acts as a link.
(Other definitions for clover that I've seen before include "Green trefoil plant" , "in which we can live luxuriously" , "Fodder plant, common on lawns" , "Forage plant (that's luxurious to live in?)" , "Common trefoil" .)