Dawn has lit up place (5)
I believe the answer is:
onset
'dawn' is the definition.
(both can mean the beginning of something)
'lit up place' is the wordplay.
I cannot quite see how this works, but
'lit' could be 'on' (eg a light that is switched on) and 'on' is found within the answer.
'place' could be 'set' (synonyms) and 'set' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'has' acts as a link.
Can you help me to learn more?
(Other definitions for onset that I've seen before include "Start - opening moments" , "Initial stage; attack" , "Appearance of" , "Start - notes (anag)" , "origin" .)