A part cut off German blokes during first of surgeries on film (7)
I believe the answer is:
segment
'a part' is the definition.
(segment is a kind of part)
'cut off german blokes during first of surgeries on film' is the wordplay.
'cut off' means to remove the last letter.
'german' becomes 'g' (abbreviation).
'blokes' becomes 'men' (I've seen this in another clue).
'during' means one lot of letters goes inside another.
'first of surgeries on film' becomes 'sent' (I can't explain this - if you can you should give a lot more credence to this answer).
'g'+'men'='gmen'
'gmen' with its last letter taken off is 'gme'.
'gme' placed within 'sent' is 'SEGMENT'.
Can you help me to learn more?
(Other definitions for segment that I've seen before include "One of several parts of a whole" , "One part of a whole" , "Section of a circle" , "Part separable from other parts, say of orange" , "Division" .)