Crossword Genius

Packed drover cowed in the confusion (11)

Ross

I believe the answer is:

overcrowded

I'm a little stuck... Click here to teach me more about this clue!

'packed' is the definition.
The answer and definition can be both to do with motion as well as being past participle verbs.
Perhaps you can see a link between them that I can't see?

'drover cowed in the confusion' is the wordplay.
'drover cowed' can be anagrammed to 'OVERCROWDED'.
Though, I am not clear how this is indicated.

Can you help me to learn more?

(Another definition for overcrowded that I've seen is " Many jails are".)

I've seen this clue in the Sydney Morning Herald.
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