Clans forced into rising to be set free (7)

I believe the answer is:

unclasp

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'set free' is the definition.
'unclasp' can be an answer for 'free' (thesaurus). I'm not sure about the 'set' bit.

'clans forced into rising' is the wordplay.
'forced' indicates an anagram.
'into' means one lot of letters goes inside another.
'rising' becomes 'up' (similar in meaning).
'clans' is an anagram of 'nclas'.
'nclas' put within 'up' is 'UNCLASP'.

'to be' is the link.

Can you help me to learn more?

(Other definitions for unclasp that I've seen before include "let go" , "Open - release from grip" , "Detach (necklace, belt, etc)" , "Unfasten" , "Loosen grip on" .)

I've seen this clue in The Guardian.

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