A gaseous element held inside mum brings forward (8)
I believe the answer is:
maradona
'forward' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'a gaseous element held inside mum' is the wordplay.
'gaseous element' becomes 'radon' (I've seen this in another clue).
'held inside' is an insertion indicator.
'mum' becomes 'ma' (both can mean mother).
'a'+'radon'='aradon'
'aradon' put within 'ma' is 'MARADONA'.
'brings' is the link.
Can you help me to learn more?
(Another definition for maradona that I've seen is " Diego --, Argentinian footballer".)