American hit - it involved a calculator (13)
I believe the answer is:
arithmetician
'a calculator' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'american hit it involved' is the wordplay.
'involved' is an anagram indicator (involved can mean confusing or complex).
'american'+'hit'+'it'='americanhitit'
'americanhitit' is an anagram of 'ARITHMETICIAN'.
Can you help me to learn more?
(Other definitions for arithmetician that I've seen before include "Expert on calculating" , "Numbers expert" .)