A friend one may make much of (4)

I believe the answer is:

chum

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

'a friend' is the definition.
(I know that chum is a type of friend)

'one may make much of' is the wordplay.
'much' anagrams to 'CHUM'.
However, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for chum that I've seen before include "Pal, buddy" , "Close friend (colloq.)" , "Good friend" , "Salmon" , "Informally, a close friend" .)

I've seen this clue in The Globe and Mail.

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