For earls, an organised football team (7)

I believe the answer is:

arsenal

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

'for earls an organised' is the wordplay.
'earls an' anagrams to 'ARSENAL'.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for arsenal that I've seen before include "Supply of weapons" , "favoured by some football supporters" , "weapons are kept here" , "6D 5A [TUBE STATION]" , "Place where guns and ammunition are stored" .)

I've seen this clue in The Daily Express.

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