Winds up roll of film (5)

I believe the answer is:

loops

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

'winds up' is the definition.
'loops' can be an answer for 'winds' (looping is a kind of winding). I'm not sure about the 'up' bit.

'roll of film' is the wordplay.
'roll' becomes 'loop' (looping is a kind of rolling).
'of film' becomes 's' (I am not sure about this - if you are sure you should believe this answer much more).
'loop'+'s'='LOOPS'

Can you help me to learn more?

(Other definitions for loops that I've seen before include "Twists" , "Oval-shaped single coils, in a piece of thread perhaps" , "Winds" .)

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

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