Adage, for example, in Gateshead (6)
I believe the answer is:
saying
'adage' is the definition.
(I've seen this in another clue)
'for example in gateshead' is the wordplay.
'for example' becomes 'say' ('say' can be used to introduce an example).
'gateshead' becomes 'g' (head letter of 'gates').
'say'+'in'+'g'='SAYING'
(Other definitions for saying that I've seen before include "Articulating" , "Adage, maxim" , "Uttering" , "Epigram" , "Delivering" .)