The most common and most likely answer to this crossword clue is the 7 letter word ICE-CAP
I've seen this crossword clue in The Guardian
I
C
E
-
C
A
P
Buddy explains!
The straight part
We know that "what Pole may display" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what pole may display = ice-cap.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 ICE-CAP mean?
ICE-CAP noun- An iced cappuccino.
- A permanent expanse of ice encompassing a large geographical area, e.g. in Earth's polar zones or at high elevation.
- An ice pack designed to be worn on the head.
- An iced coffee made by adding ice to a cappuccino.