Crossword Genius

Wine and port a judge knocked back (5)

Ross

I believe the answer is:

rioja

'wine' is the definition.
(Rioja is an example)

'port a judge knocked back' is the wordplay.
'port' becomes 'rio' (I've seen this before).
'judge' becomes 'j'.
'knocked back' shows that the letters should be reversed in order.
'a'+'j'='aj'
'aj' in reverse letter order is 'ja'.
'rio'+'ja'='RIOJA'

'and' acts as a link.

(Other definitions for rioja that I've seen before include "wine region" , "Spanish red wine" , "Spanish drink" , "North Spanish wine" , "Dry red wine from Spain" .)

I've seen this clue in The Telegraph.
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