Relish got us cooking (5)
I believe the answer is:
gusto
'relish' is the definition.
('gusto' can be a synonym of 'relish')
'got us cooking' is the wordplay.
'cooking' is an anagram indicator.
'got'+'us'='gotus'
'gotus' is an anagram of 'GUSTO'.
(Other definitions for gusto that I've seen before include "Zest, zeal" , "Relish - zest" , "Exuberant enjoyment" , "Spirit" , "Zest, exuberance" .)