Acknowledges, “Bums sit awkwardly” (7)

I believe the answer is:

submits

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'acknowledges' is the definition.
The definition and answer can be both related to thinking as well as being verbs in their -s form.
Maybe there's a link between them I don't understand?

'bums sit awkwardly' is the wordplay.
'awkwardly' indicates an anagram.
'bums'+'sit'='bumssit'
'bumssit' is an anagram of 'SUBMITS'.

Can you help me to learn more?

(Another definition for submits that I've seen is " Yields, capitulates".)

I've seen this clue in The Hindu.

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