Notices notices put up! (4)
I believe the answer is:
sees
'notices' is the definition.
(I've seen this in other clues)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sees that I've seen before include "Gets sight of" , "Clocks" , "Notices" , "Looks (both ways!)" , "Understands" .)