Played a role (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
acted
'played a role' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for acted that I've seen before include "appeared on stage" , "Worked" , "did something!" , "Played a 30ac" , "took part in simulation" .)