Stove cool for second time (5)
I believe the answer is:
again
'second time' is the definition.
(I've seen this before)
'stove cool' is the wordplay.
'stove' becomes 'aga' (I've seen this before).
'cool' becomes 'in' ('in' can mean fashionable or cool).
'aga'+'in'='AGAIN'
'for' is the link.
(Other definitions for again that I've seen before include "Furthermore" , "Moreover - a second time" , "Predictably perhaps" , "Not for the first time" , "10 10 [AGAIN" .)