Endlessly proclaim Irish politicians fake (7-2)
I believe the answer is:
trumped-up
'fake' is the definition.
(I've seen this before)
'endlessly proclaim irish politicians' is the wordplay.
'endlessly' means to remove the last letter.
'proclaim' becomes 'trumpet' (trumpeting is a kind of proclaiming).
'irish politicians' becomes 'DUP' (Democratic Unionist Party).
'trumpet' with its final letter taken away is 'trumpe'.
'trumpe'+'dup'='TRUMPED-UP'
(Other definitions for trumped-up that I've seen before include "Invented, false" , "Concocted with intent to deceive" .)