Crossword Genius

Blocking call after pub (7)

Ross

I believe the answer is:

barring

'blocking' is the definition.
(barring is a kind of blocking)

'call after pub' is the wordplay.
'call' becomes 'ring' ('ring' can be a synonym of 'call').
'after' means one lot of letters go next to another.
'pub' becomes 'bar' (I've seen this before).
'ring' put after 'bar' is 'BARRING'.

(Another definition for barring that I've seen is " Except for".)

I've seen this clue in The Telegraph.
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