Captured soldier with Resistance leader in front of boat (4)
I believe the answer is:
prow
'front of boat' is the definition.
(nautical term)
'captured soldier with resistance leader' is the wordplay.
'captured soldier' becomes 'pow' (I can't justify this - if you can you should give a lot more credence to this answer).
'with' indicates putting letters inside.
'leader' indicates taking the first letters.
The first letter of 'resistance' is 'r'.
'pow' enclosing 'r' is 'PROW'.
'in' is the link.
Can you help me to learn more?
(Other definitions for prow that I've seen before include "bows" , "Pointed front part of a ship" , "position of figurehead" , "Front of boat" , "Pointed front part of a vessel" .)