Most men can have theirs (7)
I believe the answer is:
moments
'theirs' is the definition.
I can't tell whether this definition defines the answer.
'most men can' is the wordplay.
'can' indicates an anagram (I've seen 'canned' mean this (canned can mean drunk)).
'most'+'men'='mostmen'
'mostmen' anagrammed gives 'MOMENTS'.
'have' acts as a link.
Can you help me to learn more?
(Other definitions for moments that I've seen before include "Points in time" , "Very brief periods of time" , "Short periods" .)