Deer filmed initially by angler making big impression (5)
I believe the answer is:
bambi
'deer' is the definition.
(deer in the Disney film Bambi)
'initially by angler making big impression' is the wordplay.
'initially' suggests taking the first letters.
The first letters of 'by angler making big impression' is 'BAMBI'.
'filmed' acts as a link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for bambi that I've seen before include "Disney fawn" , "Projected work" , "Disney character" , "1942 Disney film" , "7's fawn" .)