So one might get caught up in it (5)

I believe the answer is:

noose

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'it' is the definition.
The definition suggests a singular noun which matches the answer.

'so one might get caught up' is the wordplay.
'so one' anagrams to 'NOOSE'.
But, I am unsure how this is indicated.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for noose that I've seen before include "Snare, restraint" , "This exemplifies marriage for some" , "it could endanger your life" , "Loop formed by means of a slip knot" , "Circular loop" .)

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

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