I'm bored with Psycho after adaptation that's beneath grand film (7,2,5)
I believe the answer is:
goodbye mr chips
'film' is the definition.
(I've seen this before)
'i'm bored with psycho after adaptation that's beneath grand' is the wordplay.
'with' means one lot of letters go next to another.
'after adaptation' indicates anagramming the letters.
'that's beneath' means one lot of letters go next to another (in a down clue, some letters go beneath others).
'grand' becomes 'g' (G is short for grand as in a thousand).
'imboredpsycho' with letters rearranged gives 'oodbyemrchips'.
'oodbyemrchips' put after 'g' is 'GOODBYE MR CHIPS'.
(Other definitions for goodbye mr chips that I've seen before include "James Hilton novel" , "work" , "farewell speech to carpenter?" , "book" , "Film" .)