Crossword Genius

Open some beer (4)

Ross

I believe the answer is:

ajar

'open' is the definition.
(similar in meaning)

'some beer' is the wordplay.
'some' becomes 'a'.
'beer' becomes 'jar' (I've seen this before).
'a'+'jar'='AJAR'

(Other definitions for ajar that I've seen before include "Half-open" , "Unlatched" , "Mourn" , "Half open" , "Not quite shut" .)

I've seen this clue in The Telegraph.
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