Clerical office bunch regularly turning rude (6)
I believe the answer is:
curacy
'clerical office' is the definition.
'curacy' can be an answer for 'office' (curacy is a kind of office). I'm unsure of the 'clerical' bit.
'bunch regularly turning rude' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'turning' shows that the letters should be reversed in order.
'rude' becomes 'racy' (I can't justify this - if you can you should give a lot more credence to this answer).
The alternate letters of 'bunch' are 'uc'.
'uc' back-to-front is 'cu'.
'cu'+'racy'='CURACY'
Can you help me to learn more?
(Other definitions for curacy that I've seen before include "Church office" , "post for clergyman" , "Minor clerical office" , "Clergyman's office" , "position for clergyman" .)