Attack, catching us with a jagged horn (6)
I believe the answer is:
onrush
'attack' is the definition.
(synonyms)
'us with a jagged horn' is the wordplay.
I cannot quite see how this works, but
'us' is found in the answer.
an anagram of 'horn' is 'onrh' which is within the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
'catching' acts as a link.
Can you help me to learn more?
(Other definitions for onrush that I've seen before include "Attack" , "Swarm" , "Stampede" , "Forward dash" , "sudden swoop" .)