Under the blankets, hiding evidence of smoking, looking embarrassed (7)

I believe the answer is:

abashed

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'embarrassed' is the definition.
('abash' can be a synonym of 'embarrass')

I cannot understand how the rest of the clue works.

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(Other definitions for abashed that I've seen before include "Embarrassed or disconcerted" , "Feeling uneasy" , "shamed" , "Disturbed" , "Shamefaced" .)

I've seen this clue in The Times.

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