Marksmanship needed to get filming back on schedule? (13)
I believe the answer is:
sharpshooting
'marksmanship needed' is the definition.
I can't judge whether this definition defines the answer.
'to get filming back on schedule?' is the wordplay.
'to get' is an insertion indicator.
'filming' becomes 'shoot' (as in a film shoot).
'back on schedule?' becomes 'sharping' (I can't explain this - if you can you should believe this answer much more).
'shoot' placed into 'sharping' is 'SHARPSHOOTING'.
Can you help me to learn more?
(Another definition for sharpshooting that I've seen is " Expert firing".)