Avoid duel, moving east (5)
I believe the answer is:
elude
'avoid' is the definition.
(eluding is a kind of avoiding)
'duel moving east' is the wordplay.
'moving' is an anagram indicator.
'east' becomes 'e' (synonyms).
'duel' is an anagram of 'elud'.
'elud'+'e'='ELUDE'
(Other definitions for elude that I've seen before include "Avoid; slip one's mind" , "Avoid (e.g. capture)" , "Evade, escape from" , "Escape - avoid" , "Escape adroitly" .)