Ambition in Dutch Opera? (4)
I believe the answer is:
hope
'ambition' is the definition.
(thesaurus)
'in dutch opera?' is the wordplay.
'in' indicates a hidden word.
'HOPE' is hidden within 'dutch opera'.
(Other definitions for hope that I've seen before include "Bob --, US comedian" , "Longing" , "It goes with faith and charity" , "English novelist" , "Expect and desire" .)