In East London, source of warmth yielding apple? (5)
I believe the answer is:
eater
'apple?' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for eater that I've seen before include "Taker of food" , "diner" , "Consumer at table" , "Consumer of food" , "type of fruit" .)