Crossword Genius

Turn, on cue, to make weight (5)

Ross

I believe the answer is:

ounce

'weight' is the definition.
(I know that ounce is a type of apothecaries\\u0027 unit)

'turn on cue' is the wordplay.
'turn' indicates anagramming the letters.
'on'+'cue'='oncue'
'oncue' with letters rearranged gives 'OUNCE'.

'to make' acts as a link.

(Other definitions for ounce that I've seen before include "A light imperial measure of weight" , "prowler" , "Atom" , "scrap" , "weight? Surely not" .)

I've seen this clue in The Daily Express.
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