Experience Rubens' final piece hung in gallery (5)
I believe the answer is:
taste
'experience' is the definition.
(taste can mean to experience or try out)
'hung in gallery' is the wordplay.
'hung' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'gallery' becomes 'tate' (Tate Modern, Tate Britain etc).
's' put into 'tate' is 'TASTE'.
'rubens' final piece' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for taste that I've seen before include "Sample - discrimination" , "Fine perception" , "Selectivity" , "style" , "A sense; briefly sample" .)