Picked up suss fling in Dublin? (5)
I believe the answer is:
craic
'picked' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives can sometimes define each other.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for craic that I've seen before include "In Irish bars you'll get this" , "good time" , "Irish pub fun?" .)