Tank's run out - ring around for relative skilled with tools? (10)

I believe the answer is:

chimpanzee

'relative skilled with tools?' is the definition.
(relative of Homo sapiens)

I cannot understand how the rest of the clue works.

(Other definitions for chimpanzee that I've seen before include "Anthropoid ape" , "Primate" , "Great ape" , "African ape with advanced intelligence" , "Close relative of man" .)

I've seen this clue in The Independent.

Want a hint initially instead of a full solution? Install my app