Monster joints picked up in Scottish islands (7)
I believe the answer is:
orkneys
'scottish islands' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for orkneys that I've seen before include "Islands north of Britain" , "Scottish isles" , "Northerly UK islands" , "Western Isles" , "Islands off NE tip of Scottish mainland" .)