
1) Building term 2) Flax filament
Found on
https://www.crosswordclues.com/clue/harl

In Scottish usage, harling describes an exterior building-surfacing technique which results in a long-lasting weatherproof shield for a stone building. A pigment can be embedded in the harled material, thus obviating the need for repainting. Harling as a technique provides the surface of many Scottish castles, but it is also used for a variety of ...
Found on
http://en.wikipedia.org/wiki/Harl

barb of feather used to make artificial fishing fly
Found on
http://phrontistery.info/h.html

• (n.) A filamentous substance; especially, the filaments of flax or hemp. • (n.) A barb, or barbs, of a fine large feather, as of a peacock or ostrich, -- used in dressing artificial flies.
Found on
http://thinkexist.com/dictionary/meaning/harl/
Harl (härl)
noun [ Confer Old High German
harluf noose, rope; English
hards refuse of flax.]
1. A filamentous substance; especially, the filaments of flax or hemp.
2. A barb, or barbs, of a fine large feather, as of a peacock or ostrich, -- used in dressing artificial fli...
Found on
http://www.encyclo.co.uk/webster/H/14
No exact match found.