Pointer possibly showing 'open' tucked into goods
I believe the answer is:
gun dog
'pointer possibly' is the definition.
(pointer is a kind of gun dog)
'open tucked into goods' is the wordplay.
'open' becomes 'undo' (I've seen this before).
'tucked into' means one lot of letters goes inside another.
'goods' becomes 'gg' (I've seen this in other clues).
'undo' going within 'gg' is 'GUN DOG'.
'showing' acts as a link.
(Other definitions for gun dog that I've seen before include "21a 24 [GAMEKEEPER] 's hound" , "Game retriever" , "Hunter's friend" , "Setter maybe" , "'Canine for a shooter (3,3)'" .)