Sort of joint specified in permit requirements (5)
I believe the answer is:
mitre
'sort of joint' is the definition.
(I know that mitre is a type of joint)
'in permit requirements' is the wordplay.
'in' indicates the answer is hidden within the clue.
'MITRE' can be found hidden inside 'permit requirements'.
'specified' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for mitre that I've seen before include "Kind of joint" , "that goes over a cleric's head?" , "top?" , "Liturgical headdress" , "Type of joint - bishop's hat" .)