Stuff covering some rope (7)
I believe the answer is:
lanyard
'rope' is the definition.
(I've seen this before)
'stuff covering some' is the wordplay.
'stuff' becomes 'lard' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'covering' is an insertion indicator.
'some' becomes 'any' (similar in meaning).
'lard' enclosing 'any' is 'LANYARD'.
Can you help me to learn more?
(Other definitions for lanyard that I've seen before include "Part of rigging" , "Cord with whistle attached" , "Nautical rope" , "Cord worn round neck" , "Line for extending or fastening ship's rigging" .)