Cold beer first: one Guinness so handled (4)

I believe the answer is:

alec

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(Other definitions for alec that I've seen before include "Sir - Douglas-Home, former PM" , "Smart ..., he thinks he knows everything" , "Smart boy?" , "Guinness (a smart lad?)" , "Actor Guinness is smart" .)

I've seen this clue in The Sun.

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