Coward, say, did this? (7)

I believe the answer is:

cowered

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'did this?' is the definition.
The definition suggests a singular noun but the answer is not.

'coward say' is the wordplay.
'say' indicates a 'sounds like' (homophone) clue.
'coward' sounds like 'COWERED'.

Can you help me to learn more?

(Other definitions for cowered that I've seen before include "Cringed" , "looked fearful" , "Showed fear" .)

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