In Ireland, John’s spiritual meet excluding civil engineer (4)
I believe the answer is:
sean
'in ireland john's' is the definition.
(Irish version of the name John)
'spiritual meet excluding civil engineer' is the wordplay.
'spiritual meet' becomes 'seance' (meeting for communicating with the dead).
'excluding' is a deletion indicator.
'civil engineer' becomes 'ce'.
'seance' with 'ce' removed is 'SEAN'.
(Other definitions for sean that I've seen before include "Penn, Bean or O'Casey" , "Irish form of John" , "guy at Number 10 [IRISHMAN]" , "- - Connery (007)" .)