It can hold film in loops (5)
I believe the answer is:
spool
'it can hold film' is the definition.
The definition suggests a singular noun which matches the answer.
'loops' is the wordplay.
'loops' anagrams to 'SPOOL'.
But, I am not clear how the anagram is indicated.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for spool that I've seen before include "Loops around a thread holder" , "Film reel; wind" , "Ribbon holder" , "Cylinder for winding film etc" , "Loops around with reel" .)