She had a part in Silverado (4)
I believe the answer is:
vera
'she' is the definition.
(I've seen this before)
'a part in silverado' is the wordplay.
'a part in' indicates the answer is hidden within the clue.
'VERA' is hidden in the letters of 'silverado'.
'had' acts as a link.
(Other definitions for vera that I've seen before include "senior songstress?" , "Girl's name (meaning faith or true)" , "Dame -- Lynn, singer" , "and 15: Singing Dame" , ".. Lynn, aloe ..." .)