Number above 100 plus 0? Not likely (2,3,2)
I believe the answer is:
no can do
'number above' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'100 plus 0? not likely' is the wordplay.
I cannot really see how this works, but
'100' could be 'c' (Roman numeral) and 'c' is present in the answer.
'plus' could be 'and' (I've seen this before) and 'and' is present in the answer.
'0?' could be 'o' (I've seen this in other clues) and 'o' is located in the answer.
'not' could be 'no' (negative) and 'no' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for no can do that I've seen before include "That's not possible" , "Can't manage it, see doc anon" , "Impossible, I'm afraid!" , "Absolutely not!" , "Bring-a-bottle party?" .)