Terrorist group carrying pounds in old money (4)
I believe the answer is:
lira
'old money' is the definition.
(I've seen this before)
'terrorist group carrying pounds' is the wordplay.
'terrorist group' becomes 'ira' (I can't justify this - if you can you should believe this answer much more).
'carrying' is a charade indicator (letters next to each other).
'pounds' becomes 'l' (L can represent the monetary pound).
'ira' put after 'l' is 'LIRA'.
'in' is the link.
Can you help me to learn more?
(Other definitions for lira that I've seen before include "Pre-euro currency unit in Italy" , "Former unit of money in Italy" , "Turkish currency" , "Former unit of currency in Italy" , "old European capital" .)