Mountain visible in Khyber, generally (4)
I believe the answer is:
berg
'mountain' is the definition.
(I've seen this before)
'visible in khyber generally' is the wordplay.
'visible in' indicates a hidden word.
'BERG' is hidden in the letters of 'khyber generally'.
(Other definitions for berg that I've seen before include "Mass of ice floating at sea" , "He composed" , "African mount" , "Mountain; Alban --, composer" , "South African hill - Austrian composer" .)