The most common and most likely answer to this crossword clue is the 8 letter word HAYSTACK
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More clues leading to the result HAYSTACK
Buddy explains!

The straight part
We know that "A country pile" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a country pile = haystack.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 HAYSTACK mean?
HAYSTACK noun- A mound, pile, or stack of stored hay.
- (canoeing) A standing wave in a rapid.
- The text string within which another string is searched for. (see: needle in a haystack)
- A dish composed of a starchy food (rice, tortillas, crackers, etc.) topped by a protein (beans, cheese, meat, etc.) in combination with fresh vegetables, assembled on the plate by the diner.