Brave man having name for wader (5)
I believe the answer is:
heron
'wader' is the definition.
(heron is a kind of wader)
'brave man having name' is the wordplay.
'brave man' becomes 'hero' (I've seen this before**).
'having' means one lot of letters go next to another.
'name' becomes 'n' (common abbreviation e.g. on forms).
'hero'+'n'='HERON'
'for' acts as a link.
(Other definitions for heron that I've seen before include "Wader" , "One bird" , "Big bird" , "Bird of the Rhone, strangely" , "flier" .)