Chase gives us pure diversion (6)
I believe the answer is:
pursue
'chase' is the definition.
(I know that chase is a more specific form of the action pursue)
'us pure diversion' is the wordplay.
'diversion' indicates an anagram.
'us'+'pure'='uspure'
'uspure' with letters rearranged gives 'PURSUE'.
'gives' is the link.
(Other definitions for pursue that I've seen before include "Seek" , "Follow, chase" , "Give chase" , "Follow up on or go after" , "Try to win" .)