The most common and most likely answer to this crossword clue is the 5 letter word FELLS
F
E
L
L
S
Buddy explains!
The straight part
We know that "High moorland" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case high moorland = fells.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 FELLS mean?
FELLS noun- A cutting-down of timber.
- The stitching down of a fold of cloth; specifically, the portion of a kilt, from the waist to the seat, where the pleats are stitched down.
- The end of a web, formed by the last thread of the weft.
- To make something fall; especially to chop down a tree.
- To strike down, kill, destroy.
- To stitch down a protruding flap of fabric, as a seam allowance, or pleat.
- An animal skin, hide, pelt.
- Human skin (now only as a metaphorical use of previous sense).
- (obsolete outside Britain) A rocky ridge or chain of mountains.
- (obsolete outside Britain) A wild field or upland moor.