Crossword Genius

Round out UN with Pole (3)

Ross

I believe the answer is:

rod

'pole' is the definition.
('rod' can be a synonym of 'pole')

'round out un' is the wordplay.
'out' is a deletion indicator.
'round' with 'un' taken away is 'ROD'.

'with' is the link.

(Other definitions for rod that I've seen before include "Old saying 'Spare the . . . and spoil the child'" , "Baton, pole" , "Long, straight stick" , "Cane - shaft" , "Fishing implement" .)

I've seen this clue in The Mirror.
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