Stone jar containing nickel (7)
I believe the answer is:
granite
'stone' is the definition.
(I've seen this before)
'jar containing nickel' is the wordplay.
'jar' becomes 'grate' (make unpleasant sound).
'containing' indicates putting letters inside.
'nickel' becomes 'ni' ('Ni' can be a synonym of 'nickel').
'grate' enclosing 'ni' is 'GRANITE'.
(Other definitions for granite that I've seen before include "Coarse-grained igneous rock" , "Tangier (anag.)" , "Resilience; stone" , "Showing great resolution" , "Get rain (anag) - rock" .)