Be more than a dismissed anaesthetic (9)
I believe the answer is:
outnumber
'be more than' is the definition.
(I've seen this before)
'a dismissed anaesthetic' is the wordplay.
'a dismissed' becomes 'out' (I've seen this before).
'anaesthetic' becomes 'number' (i.e. something that makes things numb).
'out'+'number'='OUTNUMBER'
(Other definitions for outnumber that I've seen before include "Exceed in figures" , "Be too many for in contest or conflict" , "Exceed numerically" , "Have more (eg troops) than" , "Exceed in total of persons" .)