Gapes at an unlucky goal conceded by Les (5)

I believe the answer is:

ogles

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'gapes at an unlucky goal conceded' is the definition.
I can't tell whether this definition defines the answer.

'by les' is the wordplay.
'by' becomes 'og' (I can't explain this - if you can you should believe this answer much more).
'og'+'les'='OGLES'

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(Other definitions for ogles that I've seen before include "Looks longingly at" , "Casts amorous glances" , "Leers" , "Looks at amorously, makes eyes at" , "Looks at (someone) lecherously" .)

I've seen this clue in the Evening Standard.

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