Eastender's hat refurbishment takes time, on reflection (6)
I believe the answer is:
titfer
'reflection' is the definition.
Both the definition and answer are singular nouns.
Maybe you can see a link between them that I can't see?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for titfer that I've seen before include "A Cockney's hat" , "Headgear" , "Fitter (anag.)" , "Hat (informal)" , "Cockney rhyming slang for hat" .)