Anger seen in Emerald Isle — get away (3)
I believe the answer is:
ire
'anger' is the definition.
(ire is intense rage)
'emerald isle get away' is the wordplay.
'emerald isle' becomes 'ireland' (synonyms).
'get' becomes 'land' (landing is a kind of getting).
'away' suggests deleting specific letters.
'ireland' with 'land' removed is 'IRE'.
'seen in' acts as a link.
(Other definitions for ire that I've seen before include "Irritation, anger" , "Strong feeling" , "Outrage" , "passionate feeling" , "'Anger, wrath (3)'" .)