Broken lance not spotted (5)

I believe the answer is:

clean

'not spotted' is the definition.
(I've seen this before)

'broken lance' is the wordplay.
'broken' indicates an anagram.
'lance' is an anagram of 'CLEAN'.

(Other definitions for clean that I've seen before include "not spotted" , "Carrying no illegal drugs" , "not polluted" , "Non-polluting" , "Second part of 18" .)

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

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