Phoned in, somehow having obtained right number (9)
I believe the answer is:
endorphin
'number' is the definition.
(endorphins might numb pain)
'phoned in somehow having obtained right' is the wordplay.
'somehow' indicates anagramming the letters.
'having obtained' indicates putting letters inside.
'right' becomes 'r' (common abbreviation).
'phoned'+'in'='phonedin'
'phonedin' anagrammed gives 'endophin'.
'endophin' going around 'r' is 'ENDORPHIN'.
(Other definitions for endorphin that I've seen before include "Neurochemical with analgesic properties - dinner hop (anag)" , "Hormone in the brain with an analgesic effect" , "painkiller" , "Opiate-like substance produced in the brain" .)