Scandalous librarian’s trial terminated early with support of a big star (8)
I believe the answer is:
casanova
'scandalous librarian's trial' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'terminated early with support of a big star' is the wordplay.
'terminated early' becomes 'casa' (I can't justify this - if you can you should believe this answer much more).
'with support of' means one lot of letters go next to another (some letters go beneath or support others).
'a big star' becomes 'nova' (I've seen this in another clue).
'casa'+'nova'='CASANOVA'
Can you help me to learn more?
(Other definitions for casanova that I've seen before include "Male womaniser, after 18th century Italian" , "Giacomo" , "An Italian Don Juan" , "Italian adventurer, wrote vivid accounts of his amorous encounters" , "Memoirist" .)