By showing some superiority (3)
I believe the answer is:
per
'by' is the definition.
(I've seen this in another clue)
'some superiority' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'PER' can be found hidden inside 'superiority'.
'showing' is the link.
(Other definitions for per that I've seen before include "According to" , "Preposition indicating by means of" , "For each or every" , "Preposition meaning for each" .)