Located inside (5)
'located inside' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for internal that I've seen before include "Interior" , "Located inside" , "In-house - private" , "Located inward" , "Domestic" .)
'located inside' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for inner that I've seen before include "Part of the bull" , "It's next to the bull on the board" , "Inside; next to the bull (archery)" , "Exclusive to a center" , "Close to the centre; mental" .)