Hand parts in Fidelio 's opening to awful singer (7)
I believe the answer is:
fingers
'hand' is the definition.
(thesaurus)
'parts in fidelio 's opening to awful singer' is the wordplay.
'parts in fidelio ' becomes 'f' (I can't justify this - if you can you should give a lot more credence to this answer).
'opening' indicates putting letters inside (some letters open a gap in others).
'to awful' indicates anagramming the letters.
'singer' with letters rearranged gives 'ingers'.
'f' placed inside 'ingers' is 'FINGERS'.
Can you help me to learn more?
(Another definition for fingers that I've seen is " Digits".)