Stand out, showing a measure of pushiness (5)
I believe the answer is:
shine
'stand out' is the definition.
(thesaurus)
'a measure of pushiness' is the wordplay.
'a measure of' indicates a hidden word (a portion or measure of the clue).
'SHINE' is hidden within 'pushiness'.
'showing' is the link.
(Other definitions for shine that I've seen before include "Lustre" , "Radiate or excel" , "Glow - film about pianist" , "Give out or reflect light" , "Direct (a torch) somewhere" .)