Finished with a terrible need for a bit of aid (5)
I believe the answer is:
ended
'finished' is the definition.
(similar in meaning)
'terrible need for a bit of aid' is the wordplay.
I cannot really understand how this works, but
an anagram of 'need' is 'ende' which is within the answer.
A single letter 'd' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'with a' acts as a link.
Can you help me to learn more?
(Other definitions for ended that I've seen before include "died" , "Having come to a conclusion" , "Brought to a close" , "Concluded" , "Acclaim" .)