To go without nothing, in fact, is fine! (5)
I believe the answer is:
regal
'fine' is the definition.
(thesaurus)
'to go without nothing in fact' is the wordplay.
I cannot really see how this works, but
'to go' could be 're' (I've seen this in other clues) and 're' is found within the answer.
The remaining letters 'gal' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'is' is the link.
Can you help me to learn more?
(Other definitions for regal that I've seen before include "Showing great dignity" , "Kingly or queenly" , "fit for the Queen" , "befitting a king" , "Portable organ" .)