Crossword Genius

Permanently give up excess consumption ... (3,4)

Ross

I believe the answer is:

for good

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Here is my best explanation:

'permanently' is the definition.
(I've seen this before)

'give up excess consumption' is the wordplay.
'give up' becomes 'forgo' ('forgo' can be a synonym of 'give up').
'excess consumption' becomes 'od' (abbreviation for overdose).
'forgo'+'od'='FOR GOOD'

Ross

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This clue was last seen in The Independent

(Other definitions for for good that I've seen before include "Permanently - that's not bad", "Purpose of charitable work", "Permanently, always", "Informally, once and for all" and "on the side of the angels".)

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