New remit to watch, say (5)
I believe the answer is:
timer
'watch say' is the definition.
'timer' can be an answer for 'watch' (a watch might be used to time something). I am not certain of the 'say' bit.
'new remit' is the wordplay.
'new' indicates an anagram.
'remit' with letters rearranged gives 'TIMER'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for timer that I've seen before include "Clock or watch" , "Remit for, say, measuring device - or the measurer (5)" , "Pre-set switch" , "Eg, stopwatch" , "Preset activator" .)