Perhaps watch over what committee is asked to do (5)
I believe the answer is:
remit
'committee is asked to do' is the definition.
I can't tell whether this defines the answer.
'perhaps watch over' is the wordplay.
'perhaps watch' becomes 'timer' (a watch times things).
'over' is a reversal indicator.
'timer' written backwards gives 'REMIT'.
'what' acts as a link.
Can you help me to learn more?
(Other definitions for remit that I've seen before include "Desist from" , "Orders" , "Task/area assigned (to an organisation)" , "Transfer - area of authority" , "Shorten sentence or send money" .)