Crossword Genius

Encountered a trainee copper, say (5)

Ross

I believe the answer is:

metal

'copper say' is the definition.
(I know that copper is a type of metal)

'encountered a trainee' is the wordplay.
'encountered' becomes 'met' ('meet' can be a synonym of 'encounter').
'trainee' becomes 'l' (as in an L-plate for a learner driver).
'met'+'a'+'l'='METAL'

(Other definitions for metal that I've seen before include "Musically it can be heavy" , "Headbanger's music genre" , "Broken stone used in road-making" , "Eg, copper" , "Broken stones" .)

I've seen this clue in The Mirror.
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