Douglas, say, needs serious help after an accident (5,3)
I believe the answer is:
first aid
'help after an accident' is the definition.
'first aid' can be an answer for 'help' (I've seen this before). I'm unsure of the 'after an accident' bit.
'douglas say needs serious' is the wordplay.
I cannot quite understand how this works, but
'douglas' could be 'fir' (douglas fir is an example) and 'fir' is found in the answer.
'serious' could be 'staid' (I've seen this before) and 'staid' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for first aid that I've seen before include "Immediate medical help pending full treatment" , "Emergency procedure" , "Immediate medical assistance" , "Immediate help for the sick or injured" , "Initial treatment for injured person before doctor arrives" .)