Its a bit of a waste to let it stand (4)
I believe the answer is:
stet
'let it stand' is the definition.
(I've seen this before)
'its a bit of a waste to' is the wordplay.
'STET' is hidden in amongst the letters.
However, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for stet that I've seen before include "Instruction to cancel a deletion" , "Ignore correction" , "Leave as is - don't amend" , "Thus, leave spelling unchanged" , "Instruction to keep" .)