A lunar location, mostly pleasant, set up in approach to filming (8)
I believe the answer is:
cinerama
'approach to filming' is the definition.
(cinema projection technique)
'a lunar location mostly pleasant set up' is the wordplay.
'lunar location' becomes 'mare' (type of geographical feature of the moon).
'mostly' means to remove the last letter.
'pleasant' becomes 'nice' (associated in meaning).
'set up' is a reversal indicator.
'nice' with its final letter removed is 'nic'.
'a'+'mare'+'nic'='amarenic'
'amarenic' in reverse letter order is 'CINERAMA'.
'in' acts as a link.
(Other definitions for cinerama that I've seen before include "Hollywood technology" , "flicks" , "Method of presenting film" , "Type of old film" .)