Well-trained employee Bill regularly enters Arab country (6)
I believe the answer is:
oilman
'well-trained employee' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'bill regularly enters arab country' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'enters' is an insertion indicator.
'arab country' becomes 'oman' (I've seen this in another clue).
The alternate letters of 'bill' are 'il'.
'il' going into 'oman' is 'OILMAN'.
Can you help me to learn more?
(Other definitions for oilman that I've seen before include "Worker" , "Owner of company that sinks wells for fuel" , "One working in the "black gold" industry" , "Person involved with crude" .)