Married twice, gauges somehow it’s a futile endeavour (4,4)
I believe the answer is:
mugs game
'futile endeavour' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'married twice gauges somehow it's a' is the wordplay.
I cannot quite understand how this works, but
'married' could be 'm' (abbreviation, e.g. in genealogy) and 'm' is present in the answer.
'a' is found in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for mugs game that I've seen before include "a worthless activity" , "Eggs a mum on to informal unprofitable activity" , "Foolish act" , "Charlie's activity?" , "Worthless enterprise" .)