Joint vote rigged in Irish parliamentary house (8)
I believe the answer is:
dovetail
'joint' is the definition.
(I know that dovetail is a type of mortise and tenon)
'vote rigged in irish parliamentary house' is the wordplay.
'rigged' indicates an anagram.
'in' is an insertion indicator.
'irish parliamentary house' becomes 'dail' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'vote' is an anagram of 'ovet'.
'ovet' going into 'dail' is 'DOVETAIL'.
Can you help me to learn more?
(Other definitions for dovetail that I've seen before include "Kind of joint" , "Wood joint" , "Fit together well" , "Joint with fan-shaped tenon" , "Joint - fit neatly" .)