Staff get tired hearing of election (8)
I believe the answer is:
flagpole
'staff' is the definition.
(flagpole is a kind of staff)
'get tired hearing of election' is the wordplay.
'get tired' becomes 'flag'.
'hearing of' shows a homophone (sound like).
'election' becomes 'poll' (I've seen this before).
'poll' is a homophone of 'pole'.
'flag'+'pole'='FLAGPOLE'
(Other definitions for flagpole that I've seen before include "Ceremonial mast" , "Upholder of standards" , "Standard post" , "Pin" , "Mast on which banner is hoist" .)