Keep parts for sailor appealing to film's producers (8)

'appealing to film's producers' is the definition.
I can't judge whether this defines the answer.

'keep parts for sailor' is the wordplay.
I cannot quite see how this works, but
'sailor' could be 'ab' (abbreviation for able seaman) and 'ab' is found within the answer.
'keep' could be 'castle' (I've seen this before) and 'castle' is found within the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...

Can you help me to learn more?