It may be detected in your eyes (5)

I believe the answer is:

smoke

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'it may be detected in your eyes' is the definition.
The definition suggests a singular noun which matches the answer.

This is all the clue.

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(Other definitions for smoke that I've seen before include "Fumigate; cigarette" , "'There's no . . . . . without fire'" , "Cigarette or cigar (colloq.)" , "Use a cigarette" , "Fume" .)

I've seen this clue in the Evening Standard.

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