Be prominent among those who refuse to yield (5,3)
I believe the answer is:
stand out
'be prominent among those who refuse to yield' is the definition.
'stand out' can be an answer for 'be prominent' (I've seen this before). I'm unsure of the rest of the definition.
'be prominent' is the wordplay.
'be' becomes 'stand' (standing is a kind of being).
'prominent' becomes 'out' (I am not sure about this - if you are sure you should believe this answer much more).
'stand'+'out'='STAND OUT'
Can you help me to learn more?
(Other definitions for stand out that I've seen before include "Refuse to agree - project" , "highlighted?" , "Be prominent or superior" , "Be conspicuous, or persist in demand" , "Be proud" .)