Butler in film concealing right jumble (6)
I believe the answer is:
garble
'jumble' is the definition.
(I've seen this before)
'butler in film concealing right' is the wordplay.
I cannot quite see how this works, but
'right' could be 'ar' (I've seen this in other clues) and 'ar' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for garble that I've seen before include "jumble" , "Give confused account, hard to understand" , "Distort text or its meaning" , "Confuse (a message)" , "distorted transmission" .)