Ordered aaabcehillpt (12)

I believe the answer is:

alphabetical

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'ordered' is the definition.
(similar in meaning)

'aaabcehillpt' is the wordplay.
'aaabcehillpt' anagrams to 'ALPHABETICAL'.
Though, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for alphabetical that I've seen before include "Arranged in order from A to Z" , "Ordered A to Z" , "One kind of order" , "One sort of order" , "Related to 26 characters" .)

I've seen this clue in The Telegraph.

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