Fielder I'm about to remove (3-3)
I believe the answer is:
mid-off
'fielder' is the definition.
(I've seen this before)
'i'm about to remove' is the wordplay.
'about' says the letters should be written in reverse.
'to' says to put letters next to each other.
'remove' becomes 'doff' (I've seen this in another clue).
'im' in reverse letter order is 'mi'.
'mi'+'doff'='MID-OFF'
(Other definitions for mid-off that I've seen before include "Cricket fielding position" , "Position in the field" , "Someone in field" .)