Fight to keep trespassers out? (5)
I believe the answer is:
fence
This might be a double definition.
'fight' is the first definition.
(fencing is a sword-fighting sport)
'keep trespassers out?' is the second definition.
'fence' can be an answer for 'keep' (thesaurus). I'm unsure of the 'trespassers out?' bit.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for fence that I've seen before include "With blade, fight" , "Barrier that serves to enclose an area" , "Barrier; deal in stolen goods" , "Paling; criminal receiver" , "use offensive weapons" .)