Man has weight to cut down (3)
I believe the answer is:
hew
'cut down' is the definition.
(I've seen this in another clue)
'man has weight' is the wordplay.
'man' becomes 'he' (he refers to a man).
'has' means one lot of letters go next to another.
'weight' becomes 'w' (short for weight).
'he'+'w'='HEW'
'to' acts as a link.
(Other definitions for hew that I've seen before include "'Cut, fell or shape (3)'" , "Chop or cut with axe" , "Shape wood, as with an axe" , "Chop; sounds like colour" , "Cut with blows" .)