Vincent displays good bearing (4)
I believe the answer is:
gene
'vincent' is the definition.
(I've seen this before)
'good bearing' is the wordplay.
'good' becomes 'gen' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'bearing' becomes 'e' (East, a compass bearing or direction).
'gen'+'e'='GENE'
'displays' is the link.
Can you help me to learn more?
(Other definitions for gene that I've seen before include "- - Kelly, dancer" , "Factor controlling heredity carried by chromosome" , "Something got from parent < for boy" , "and 16 Down: Rockabilly singer" , "-- Pitney, singer" .)