Outbrain me cleverly with an instrument (10)
I believe the answer is:
tambourine
'an instrument' is the definition.
(I know that tambourine is a type of drum)
'outbrain me cleverly' is the wordplay.
'cleverly' indicates an anagram (a clever or tricky version of the letters).
'outbrain'+'me'='outbrainme'
'outbrainme' is an anagram of 'TAMBOURINE'.
'with' is the link.
(Other definitions for tambourine that I've seen before include "Percussion instrument" , "drum" , "One uses jingles" , "Shaken instrument" .)