Part of an ensemble Dvorak conducted (3)
I believe the answer is:
led
'conducted' is the definition.
(similar in meaning)
'part of an ensemble dvorak' is the wordplay.
'part of' indicates a hidden word.
'LED' is hidden within 'ensemble dvorak'.
(Other definitions for led that I've seen before include "Light-emitting diode (abbr.)" , "had the edge" , "Something emitting light" , "Shown the way" , "induced to" .)