Might mysterious first man help to light the way (8)
I believe the answer is:
headlamp
'light the way' is the definition.
'headlamp' can be an answer for 'light' (I've seen this before). I am not sure about the 'the way' bit.
'might mysterious first man help' is the wordplay.
I cannot quite understand how this works, but
'first' could be 'a' (first letter of the alphabet) and 'a' is present in the answer.
'man' could be 'he' (he refers to a man) and 'he' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Another definition for headlamp that I've seen is " Chief light on car".)