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Yawning in front of Met, looking innocent (4-5)

Ross

I believe the answer is:

open-faced

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'looking innocent' is the definition.
The definition suggests an adjective which matches the answer.

'yawning in front of met' is the wordplay.
'yawning' becomes 'open' (similar in meaning).
'in front of' says to put letters next to each other (some letters go in front of others).
'met' becomes 'faced' (facing is a kind of meeting).
'open'+'faced'='OPEN-FACED'

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I've seen this clue in The Telegraph.
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