Clue: Native Americans handing us 'avocado', 'tomato', linguistically (primarily)? (7)
Answer: NAHUATL
Explanation: Native Americans handing us 'avocado', 'tomato', linguistically (primarily)? (7)
First letters ('primarily') of '**N**ative **A**mericans **H**anding **U**s **A**vocado **T**omato **L**inguistically'; as Nahuatl is the Aztec language, this is a very neat &lit.