Hiding burnt matter in can in Singapore (8)
I believe the answer is:
stashing
'hiding' is the definition.
(I've seen this in another clue)
'burnt matter in can in singapore' is the wordplay.
'burnt matter' becomes 'ash' (I've seen this before).
'in' indicates putting letters inside.
'can in singapore' becomes 'sting' (I can't justify this - if you can you should give a lot more credence to this answer).
'ash' inserted within 'sting' is 'STASHING'.
Can you help me to learn more?
(Other definitions for stashing that I've seen before include "Storing in a secret place" , "stocking, secretly" , "Stowing away" .)