Small edge goes to fielder (4)
I believe the answer is:
slip
'fielder' is the definition.
(slip is a cricket fielding position)
'small edge goes to' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'edge' becomes 'lip' (lip is a kind of edge).
'goes to' means one lot of letters go next to another.
's'+'lip'='SLIP'
(Other definitions for slip that I've seen before include "Fall or make a small mistake" , "Cricket fielder - mistake" , "release > voucher" , "One on cricket field" , "Error; lose one's footing" .)