Rushes defence of humanities (5)
I believe the answer is:
darts
'rushes' is the definition.
(darting is a kind of rushing)
'defence of humanities' is the wordplay.
'defence of' becomes 'd' (I can't justify this - if you can you should give a lot more credence to this answer).
'humanities' becomes 'arts' (I've seen this in another clue).
'd'+'arts'='DARTS'
Can you help me to learn more?
(Other definitions for darts that I've seen before include "Moves along rapidly" , "Tears" , "Game with board and missiles" , "They are thrown at targets in pubs" , "Game in which missiles are thrown at target" .)