Something advantageous, like false teeth, say (5)
I believe the answer is:
asset
'something' is the definition.
(I have seen 'Something of worth ' mean 'asset' so perhaps 'something' could also mean 'asset')
'advantageous like false teeth say' is the wordplay.
I cannot really see how this works, but
'like' could be 'as' and 'as' is present in the answer.
The remaining letters 'set' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for asset that I've seen before include "Valuable possession, worth having" , "Boon" , "Useful or valuable quality or possession" , "Useful item" , "Item conferring advantage" .)