Largely racy, I compose silly, amusing entertainments (5,6)

'amusing entertainments' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how they can define each other.

'largely racy i compose silly' is the wordplay.
'largely' means to remove the last letter (most but not all of the letters).
'silly' is an anagram indicator.
'racy' with its last letter taken away is 'rac'.
'rac'+'i'+'compose'='racicompose'
'racicompose' with letters rearranged gives 'COMIC OPERAS'.

Can you help me to learn more?