The most common and most likely answer to this crossword clue is the 5 letter word PINGO
P
I
N
G
O
Buddy explains!
The straight part
We know that "ice cone" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ice cone = pingo.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 PINGO mean?
PINGO noun- A conical mound of earth with an ice core caused by permafrost uplift, particularly if lasting more than a year.
- (Sri Lanka) A flexible pole supported on one shoulder, with a load suspended from each end; a carrying pole or carrying yoke.
- (Sri Lanka) A measure of weight equivalent to that which can be carried using a pingo, perhaps about 55 pounds (25 kilograms) (see the 2013 quotation).