Find fault with regularly sharing deeper arrangement (9)
I believe the answer is:
reprehend
'find fault with' is the definition.
(I've seen this before)
'regularly sharing deeper arrangement' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'arrangement' indicates an anagram.
The alternate letters of 'sharing' are 'hrn'.
'hrn'+'deeper'='hrndeeper'
'hrndeeper' with letters rearranged gives 'REPREHEND'.
(Other definitions for reprehend that I've seen before include "Address reprimand to (someone)" , "Find fault with" , "Criticise" , "tick off" , "Censure" .)