Decorate Bond's superior sounding superior (6)
I believe the answer is:
emboss
'decorate bond's superior' is the definition.
'emboss' can be an answer for 'decorate' (I've seen this in another clue). I'm not certain of the 'bond's superior' bit.
'sounding superior' is the wordplay.
'sounding' becomes 'em' (I can't justify this - if you can you should believe this answer much more).
'superior' becomes 'boss' (similar in meaning).
'em'+'boss'='EMBOSS'
Can you help me to learn more?
(Other definitions for emboss that I've seen before include "printing style" , "opposite of grave" , "Execute in relief" , "Produce raised design" , "Produce a relief design" .)