Spook edgy waiter with Thai dish (6)
I believe the answer is:
wraith
'spook' is the definition.
(I know this)
'edgy waiter with thai dish' is the wordplay.
'edgy waiter' becomes 'wr' (I can't explain this - if you can you should believe this answer much more).
'with' means one lot of letters go next to another.
'dish' indicates anagramming the letters (dish can informally mean to destroy).
'thai' with letters rearranged gives 'aith'.
'wr'+'aith'='WRAITH'
Can you help me to learn more?
(Other definitions for wraith that I've seen before include "Ghost or spectral appartition" , "Spook" , "Ghost, spectral apparition" , "Ghostly apparition" , "'Ghost, spectre (6)'" .)