Daze with daylight devouring the last of the night (4)
I believe the answer is:
stun
'daze' is the definition.
(I know that daze can be written as stun)
'daylight devouring the last of the night' is the wordplay.
'daylight' becomes 'sun' (I've seen this in another clue).
'devouring' indicates putting letters inside.
'the last of' says to take the final letters.
The final letter of 'night' is 't'.
'sun' enclosing 't' is 'STUN'.
'with' acts as a link.
(Other definitions for stun that I've seen before include "Shock, flabbergast" , "Put out for the count" , "cause amazement" , "Knock into a semi-conscious state" , "Leave speechless" .)