Slow and enjoyable breakfast dish, not cold (8)
I believe the answer is:
funereal
'slow' is the definition.
'enjoyable breakfast dish not cold' is the wordplay.
'enjoyable' becomes 'fun'.
'breakfast dish' becomes 'cereal' (I've seen this before).
'not' indicates named letters should be taken away.
'cold' becomes 'c' (eg on taps).
'cereal' with 'c' taken away is 'ereal'.
'fun'+'ereal'='FUNEREAL'
'and' is the link.
(Other definitions for funereal that I've seen before include "Of sombre character" , "Of the ritual of the dead" , "Gloomy" .)