Drink, cold, for smart fellow (4)

I believe the answer is:

alec

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'smart fellow' is the definition.
The definition suggests a singular noun which matches the answer.

'drink cold' is the wordplay.
'drink' becomes 'ale' (type of beer).
'cold' becomes 'c' (eg on taps).
'ale'+'c'='ALEC'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for alec that I've seen before include "A smart . . . . is a know-all in lace" , "Smart chap" , "Sir -- Guinness, actor" , "Boy's name (a smart one?)" , "Guinness (a smart lad?)" .)

I've seen this clue in The Sun.

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