What cockneys say when they see gold? (3)
I believe the answer is:
cor
'what cockneys say when they' is the definition.
The definition suggests an adverb but the answer is not.
'see gold?' is the wordplay.
'see' becomes 'c' (the word for the letter, according to Chambers).
'gold?' becomes 'or' ('or' is the heraldic name for gold).
'c'+'or'='COR'
Can you help me to learn more?
(Other definitions for cor that I've seen before include "Gosh" , "Blimey" , "Surprised expression" , "Expression of surprise" .)