Agrees with absurd dons (4)
I believe the answer is:
nods
'agrees' is the definition.
(I've seen this before)
'absurd dons' is the wordplay.
'absurd' indicates an anagram.
'dons' anagrammed gives 'NODS'.
'with' acts as a link.
(Other definitions for nods that I've seen before include "Shows assent" , "Affirmative gestures" , "Is careless" , "gestures in agreement" , "Agrees" .)