My nude pose mostly excited Hoskins, for example (9)
I believe the answer is:
pseudonym
'hoskins for example' is the definition.
I can't judge whether this definition defines the answer.
'my nude pose mostly excited' is the wordplay.
'mostly' means to remove the last letter (most but not all of the word).
'excited' indicates an anagram.
'my'+'nude'+'pose'='mynudepose'
'mynudepose' with its last letter taken off is 'mynudepos'.
'mynudepos' anagrammed gives 'PSEUDONYM'.
Can you help me to learn more?
(Other definitions for pseudonym that I've seen before include "Pen-name" , "Cinephile, for one" , "Lewis Carroll, perhaps?" , "Also known as" , "Pen name - use my pond (anag)" .)