Coin to steal self-centredly? (6)

I believe the answer is:

nickel

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'coin' is the definition.
(nickel is a kind of coin)

'steal self-centredly?' is the wordplay.
'steal' becomes 'nick' (nick can informally mean to steal).
'self-centredly?' becomes 'el' (I can't explain this - if you can you should believe this answer much more).
'nick'+'el'='NICKEL'

'to' is the link.

Can you help me to learn more?

(Other definitions for nickel that I've seen before include "Metal - 5 cents" , "US 5 cents" , "Metal; five US cents" , "American 5-cent piece" , "US coin worth five cents" .)

I've seen this clue in the Evening Standard.

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