Orator gutted by friend using speech (6)
I believe the answer is:
orally
'orator gutted by friend using speech' is the definition.
I can't judge whether this defines the answer.
'orator gutted by friend' is the wordplay.
'gutted' suggests removing the centre (to gut something is to remove its insides).
'by' means one lot of letters go next to another.
'friend' becomes 'ally' (an ally is a friend or supporter).
'orator' with its centre taken out is 'or'.
'or'+'ally'='ORALLY'
Can you help me to learn more?
(Other definitions for orally that I've seen before include "as auditions are done" , "By (word of) mouth" , "How one speaks" , "By spoken word" , "given by mouth" .)