One possibly in dread of being attacked (6)
I believe the answer is:
raided
'being attacked' is the definition.
(I've seen this before)
'one possibly in dread' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
an anagram of 'dread' is 'raded' which is present in the remaining letters.
No letters remain.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for raided that I've seen before include "Made a sudden surprise attack on" , "Attacked" , "Entered a territory and took spoils" .)