Spit for roasting rubbish is second on the lake (10)
I believe the answer is:
rotisserie
'spit for roasting' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'rubbish is second on the lake' is the wordplay.
'rubbish' becomes 'rot' (both can mean nonsense).
'second' becomes 's' (common abbreviation).
'on' says to put letters next to each other.
'the lake' becomes 'erie' (Lake Erie is one of the Canadian/US 'Great Lakes').
'rot'+'is'+'s'+'erie'='ROTISSERIE'
Can you help me to learn more?
(Other definitions for rotisserie that I've seen before include "Turning roasting spit" , "Turning meat spit" , "Rotating spit for roasting" , "feature of expensive ovens" , "something used for cooking" .)