One starting a new life being married, I concede (7)
I believe the answer is:
migrant
'one starting a new life' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'married i concede' is the wordplay.
'married' becomes 'm' (abbreviation, e.g. in genealogy).
'concede' becomes 'grant' (synonyms).
'm'+'i'+'grant'='MIGRANT'
'being' is the link.
Can you help me to learn more?
(Other definitions for migrant that I've seen before include "One travelling to find work" , "Person moving countries" , "one leaving the country" , "Transient" , "Animal moving with the seasons" .)