Crossword Genius

A good set of drinks on the rocks? (7)

Ross

I believe the answer is:

aground

'on the rocks?' is the definition.
(I've seen this before)

'a good set of drinks' is the wordplay.
'good' becomes 'g' (abbreviation).
'set of drinks' becomes 'round' (as in a round of drinks ordered at a bar).
'a'+'g'+'round'='AGROUND'

(Other definitions for aground that I've seen before include "(Of ship) touching the bottom" , "On guard (anag.)" , "out of water" , "No longer floating" , "Beached" .)

I've seen this clue in The Times.
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