Anyway, it's not the part of Ireland where lire can be in circulation! (3)
I believe the answer is:
and
'lire can be in circulation' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'anyway it's not the part of ireland where' is the wordplay.
'the part of' says to take the initial letters (I've seen 'part' mean this).
'ireland where' becomes 'd' (I am not sure about this - if you are sure you should believe this answer much more).
The initial letters of 'anyway not' is 'an'.
'an'+'d'='AND'
Can you help me to learn more?
(Other definitions for and that I've seen before include "See 20" , "it needs wholly positive input for positive result" , "It's used to connect words, clauses or sentences" , "& 18 You bet!" , "Also" .)