Central heating on stream as a kind of offering? (5)
I believe the answer is:
burnt
'a kind of offering?' is the definition.
'central heating on stream' is the wordplay.
'central' indicates the central letters.
'on' says to put letters next to each other.
'stream' becomes 'burn' (a burn is a small stream).
The middle of 'heating' is 't'.
't' put after 'burn' is 'BURNT'.
'as' is the link.
(Other definitions for burnt that I've seen before include "Incinerated" , "Reduced to ashes" , "Affected by fire" , "subjected to arson attack" , "Consumed by fire" .)