Football team learn as thrashed (7)

I believe the answer is:

arsenal

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'football team' is the definition.
(Arsenal football club)

'learn as thrashed' is the wordplay.
'learn as' can be anagrammed to 'ARSENAL'.
However, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for arsenal that I've seen before include "A military store of guns and armaments" , "All a country's weapons" , "Supply of weapons" , "Where the guns are and who are The Gunners are" , "array of weapons" .)

I've seen this clue in The Sun.

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