Still a way to go! (6)

I believe the answer is:
steady
'still' is the definition.
(thesaurus)
'a way to go' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
'way' could be 'st' (abbreviation for street) and 'st' is found in the answer.
The remaining letters 'edy' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for steady that I've seen before include "Stable, not shaky" , "Ovisac of some marine creatures" , "Balanced, not shaky" , "Unwavering" , "Firm; regular" .)
