I'm sorry about that guess, too - I agree, it was a good one.
As for your questions, (1) "flee" is not part of the crypticness, but the person does it from the name that is hidden; and (2) it has nothing to do with Pellenor Fields.
BONUS CLUE:  This person is found in (and only in, I believe) the Silmarilion.
Here it is again, in case you haven't memorized it:
 
	Quote:
	
	
		| Flee from the foreshortened warrior And his dim companion!
 Misleading in name,
 But unerring in path.
 |