Pop diva wearing fake sable stands outside (9)

'stands outside' is the definition.
'bleachers' can be an answer for 'stands' (I've seen this in another clue). I'm unsure of the 'outside' bit.

'pop diva wearing fake sable' is the wordplay.
'pop diva' becomes 'cher' (I can't explain this - if you can you should give a lot more credence to this answer).
'wearing' means one lot of letters goes inside another.
'fake' indicates an anagram (I've seen this in other clues).
'sable' anagrammed gives 'bleas'.
'cher' put into 'bleas' is 'BLEACHERS'.

Can you help me to learn more?