Man to retry plan (5)
I believe the answer is:
terry
'man' is the definition.
(I have seen 'A man' mean 'terry' so perhaps 'man' could also mean 'terry')
'retry plan' is the wordplay.
'plan' indicates anagramming the letters (plan can mean organise).
'retry' is an anagram of 'TERRY'.
'to' acts as a link.
(Other definitions for terry that I've seen before include "A man" , "Towelling fabric" , "Towelling material" , "What could be material" , "Terence (dim.)" .)