Bore throwing nuts aside (9)
I believe the answer is:
sustained
'bore' is the definition.
(to bear is to carry or sustain a weight)
'throwing nuts aside' is the wordplay.
'throwing' indicates anagramming the letters (letters get thrown around).
'nuts'+'aside'='nutsaside'
'nutsaside' with letters rearranged gives 'SUSTAINED'.
(Other definitions for sustained that I've seen before include "Kept going, supported" , "Long drawn-out" , "suffered" , "prolonged" , "Steadily maintained" .)