Porridge in the main ordered from AA motel (7)

I believe the answer is:

oatmeal

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'porridge in the main' is the definition.
'oatmeal' can be an answer for 'porridge' (synonyms). I'm not sure about the 'in the main' bit.

'ordered from aa motel' is the wordplay.
'ordered from' indicates anagramming the letters.
'aa'+'motel'='aamotel'
'aamotel' anagrammed gives 'OATMEAL'.

Can you help me to learn more?

(Other definitions for oatmeal that I've seen before include "Colour - to a male (anag)" , "The stuff porridge is made from" , "ground food!" , "Porridge constituent" , "Ground cereal" .)

I've seen this clue in The Telegraph.

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