Spherical bullet (5)

I believe the answer is:

round

I believe this clue is a double definition.

'spherical' is the first definition.
(similar in meaning)

'bullet' is the second definition.
(I've seen this in another clue)

(Other definitions for round that I've seen before include "purchase of drinks" , "Set of drinks; song" , "A partsong in which voices follow each other" , "Piece of ammunition" , "Like ball < in rough" .)

I've seen this clue in The Globe and Mail and The Telegraph.

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