Involve Irish leader in hire charge right away (6)
I believe the answer is:
entail
'involve' is the definition.
(entail means to involve or require)
'irish leader in hire charge right away' is the wordplay.
'irish leader' becomes 'i' (I can't explain this - if you can you should believe this answer much more).
'in' indicates putting letters inside.
'hire charge' becomes 'rental' (I've seen this before).
'right' becomes 'r' (common abbreviation).
'away' is a deletion indicator.
'rental' with 'r' taken out is 'ental'.
'i' put inside 'ental' is 'ENTAIL'.
(Other definitions for entail that I've seen before include "Restriction on inheritance" , "Cut" , "Estate settled" , "settlement of estate" , "Invlove or necessitate" .)