Sort out toilet pan: promise? (9)
I believe the answer is:
potential
'promise?' is the definition.
(I've seen this before)
'sort out toilet pan' is the wordplay.
'sort out' indicates anagramming the letters.
'toilet'+'pan'='toiletpan'
'toiletpan' anagrammed gives 'POTENTIAL'.
(Other definitions for potential that I've seen before include "Inherent, though latent, capacity" , "Likely, though not yet tested" , "Inherent capacity not realised" , "Possible (capacities of a person or situation)" , "Latent talent" .)