For boxing, protective cover is needed (6)
I believe the answer is:
casing
'for boxing' is the definition.
The answer and definition can be both to do with contact as well as being present participle verbs.
Maybe you can see a link between them that I don't see?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for casing that I've seen before include "Outer protective covering" , "Outer covering of something" , "Outside cover" , "Protective covering as of engine" , "Recceing" .)