Brand using digital tech is to prove a winner (4,2)
I believe the answer is:
make it
'to prove a winner' is the definition.
I can't judge whether this definition defines the answer.
'brand using digital tech' is the wordplay.
'brand' becomes 'make' (synonyms).
'using' says to put letters next to each other.
'digital tech' becomes 'it' (I can't explain this - if you can you should give a lot more credence to this answer).
'make'+'it'='MAKE IT'
'is' is the link.
Can you help me to learn more?
(Other definitions for make it that I've seen before include "To become a success" , "go far" , "Achieve one's objective" , "Be sucessful, get there" .)