Let an Irish priest on X? (8)
I believe the answer is:
tenanted
'let an irish priest on x?' is the definition.
I can't tell whether this definition defines the answer.
'priest on x?' is the wordplay.
'priest' becomes 'anted' (I can't explain this - if you can you should believe this answer much more).
'on' says to put letters next to each other.
'x?' becomes 'ten' (X is the Roman numeral for ten).
'anted' put after 'ten' is 'TENANTED'.
Can you help me to learn more?
(Another definition for tenanted that I've seen is " Occupied for rent".)