Crossword Genius

How to liberate a collection without charge (3,4)

Ross

I believe the answer is:

set free

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

'how to liberate a' is the definition.
I can't judge whether this defines the answer.

'collection without charge' is the wordplay.
'collection' becomes 'set' (set is a kind of collection).
'without charge' becomes 'free' (sold at no cost).
'set'+'free'='SET FREE'

Can you help me to learn more?

(Other definitions for set free that I've seen before include "Clear" , "no longer detained" , "Uncaged birds have been" , "no longer confined" , "Release, remove restraints" .)

I've seen this clue in the Sydney Morning Herald.
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