Rushing madly in great confusion (7)
I believe the answer is:
tearing
'rushing madly' is the definition.
'tearing' can be an answer for 'rushing' (tearing is a kind of rushing). I'm not certain of the 'madly' bit.
'in great confusion' is the wordplay.
'confusion' is an anagram indicator.
'in'+'great'='ingreat'
'ingreat' is an anagram of 'TEARING'.
Can you help me to learn more?
(Other definitions for tearing that I've seen before include "violent" , "'Pulling apart, ripping (7)'" , "splitting" , "Granite (anag.)" .)