Check a second one's leather (7)
I believe the answer is:
chamois
'leather' is the definition.
(chamois leather is a kind of leather)
'check a second one's' is the wordplay.
'check' becomes 'ch' (abbreviation).
'second' becomes 'mo' (both are short periods of time).
'one's' becomes 'i's' (Roman numeral).
'ch'+'a'+'mo'+'is'='CHAMOIS'
(Other definitions for chamois that I've seen before include "Mountain antelope - soft leather" , "not one to put a foot wrong!" , "Soft suede leather" , "Goat-like antelope" , "Mountain-dwelling antelope" .)