Mockery aside, left to go to dirty place (8)
I believe the answer is:
travesty
'mockery' is the definition.
(synonyms)
'aside left to go to dirty place' is the wordplay.
'aside left' becomes 'trave' (I can't explain this - if you can you should believe this answer much more).
'to go to' is a charade indicator (letters next to each other).
'dirty place' becomes 'sty' (I've seen this in another clue).
'trave'+'sty'='TRAVESTY'
Can you help me to learn more?
(Other definitions for travesty that I've seen before include "Grotesque representation" , "Make grotesque" , "Sham" , "Take off" , "Vary test (anag.)" .)