Baffle egghead in wild duel (5)
I believe the answer is:
elude
'baffle' is the definition.
(I know that elude is a more specific form of the action baffle)
'egghead in wild duel' is the wordplay.
'egghead' becomes 'e' (head letter of 'egg').
'in wild' indicates an anagram (I've seen this in other clues).
'duel' with letters rearranged gives 'lude'.
'e'+'lude'='ELUDE'
(Other definitions for elude that I've seen before include "Evade; baffle" , "Escape - avoid" , "Dodge, duck" , "Puzzle" , "Dodge or avoid" .)