Cryptic crossword clue
Open with same key before and after? That could be a pointer 3,3

The most common and most likely answer to this crossword clue is the 6 letter word GUNDOG

I've seen this crossword clue in The Sunday Telegraph
G
U
N
D
O
G


Buddy explains!

The straight part
We know that "That could be a pointer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that could be a pointer = gundog.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

What does GUNDOG mean?

GUNDOG noun
  1. A breed of dog used by hunters to find, flush out and retrieve birds and other game.

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