Protective barrier in sport? (7)
I believe the answer is:
fencing
This could be a double definition.
'protective barrier' is the first definition.
'fencing' can be an answer for 'barrier' (fencing is a kind of barrier). I am not sure about the 'protective' bit.
'sport?' is the second definition.
(I've seen this before)
'in' is the link.
Can you help me to learn more?
(Other definitions for fencing that I've seen before include "Sport with swords" , "Olympic sport since 1896" , "enclosure" , "Barrier; sport" .)