Leeds game? Time for one with most minutes under his belt (6)
I believe the answer is:
eldest
'one with most minutes under his belt' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'leeds game? time' is the wordplay.
'game?' indicates an anagram (solving anagrams is a game).
'time' becomes 't'.
'leeds' anagrammed gives 'eldes'.
'eldes'+'t'='ELDEST'
'for' is the link.
Can you help me to learn more?
(Other definitions for eldest that I've seen before include "Most advanced in age, led set (anag.)" , "First in the order of birth" , "most early in origin" , "heir?" , "Such as Cain, say" .)