Where choppers found cutting into the lip or tongue (8)
I believe the answer is:
heliport
'where choppers found' is the definition.
(place where helicopters or choppers are found)
'cutting into the lip or tongue' is the wordplay.
'cutting into' says the answer is hidden in the clue.
'HELIPORT' is hidden in the letters of 'the lip or tongue'.
(Other definitions for heliport that I've seen before include "landing area" , "Rotary-winged landing place" , "Landing pad" , "Landing-place" , "where choppers may rest" .)