What addict maybe did to obtain free drugs once? (9)

I believe the answer is:

scrounged

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'what addict maybe did to' is the definition.
I can't tell whether this defines the answer.

'free drugs once?' is the wordplay.
'free' is an anagram indicator.
'drugs'+'once'='drugsonce'
'drugsonce' with letters rearranged gives 'SCROUNGED'.

'obtain' is the link.

Can you help me to learn more?

(Another definition for scrounged that I've seen is " Co-eds rung up and cadged".)

I've seen this clue in The Telegraph.

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