Press irritate Oriental in rally (8)
I believe the answer is:
jamboree
'rally' is the definition.
(I've seen this before)
'press irritate oriental' is the wordplay.
'press' becomes 'jam' ('jam' can be a synonym of 'press').
'irritate' becomes 'bore' (I've seen this before).
'oriental' becomes 'e'.
'jam'+'bore'+'e'='JAMBOREE'
'in' is the link.
(Other definitions for jamboree that I've seen before include "Large and lively party" , "'Gala get-together, of scouts say (8)'" , "Lively gathering" , "beano" , "A mere job (anag.)" .)