Tighten your belt in stocking's top fold (6)
I believe the answer is:
scrimp
'tighten your belt' is the definition.
I can't judge whether this defines the answer.
'stocking's top fold' is the wordplay.
'stocking's top' becomes 's' (I can't justify this - if you can you should believe this answer much more).
'fold' becomes 'crimp' (synonyms).
's'+'crimp'='SCRIMP'
'in' is the link.
Can you help me to learn more?
(Other definitions for scrimp that I've seen before include "To pinch pennies" , "Be economical, mean, with" , "Use or do less than is needed, be mean" , "Be frugal and sparing" , "Pinch and save" .)