Iron everything upside down for man (5)
I believe the answer is:
fella
'man' is the definition.
(non-standard spelling of 'fellow')
'iron everything upside down' is the wordplay.
'iron' becomes 'Fe' (Fe is the chemical symbol for iron).
'everything' becomes 'all' (I've seen this before).
'upside down' is a reversal indicator.
'all' reversed gives 'lla'.
'fe'+'lla'='FELLA'
'for' is the link.
(Other definitions for fella that I've seen before include "Chap" , "Guy" , "Bloke" .)