State there's nothing but a hothead at Number Ten! (4)
I believe the answer is:
ohio
'state' is the definition.
(Ohio is an example)
'nothing but a hothead at number ten' is the wordplay.
'nothing but' becomes 'o' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'a hothead' becomes 'h' (head letter of 'hot').
'at' says to put letters next to each other.
'number ten' becomes 'IO' (IO resembles o0).
'o'+'h'+'io'='OHIO'
'there's' is the link.
Can you help me to learn more?
(Other definitions for ohio that I've seen before include "great river" , "E. central US state" , "US state, joined in 1803" , "US state, capital Columbus" , "Turning engine part" .)