Tolerate an element of Pan-Arab ideology (5)
I believe the answer is:
abide
'tolerate' is the definition.
('abide' can be a synonym of 'tolerate')
'an element of pan-arab ideology' is the wordplay.
'an element of' says the answer is hidden in the clue (I've seen this in other clues).
'ABIDE' can be found hidden inside 'pan arab ideology'.
(Other definitions for abide that I've seen before include "Stomach" , "Put up with" , "Live, dwell (archaic)" , "live in the past?" , "Endure, tolerate" .)