Yellowish-brown insect biting one on end of leg (5)
I believe the answer is:
Here is my best explanation:
'yellowish-brown' is the definition.
'insect biting one on end of leg' is the subsidiary indication.
'insect' becomes 'bee' (bee is a kind of insect).
'biting' means one lot of letters goes inside another (I've seen this in other clues).
'one' becomes 'i' (roman numeral).
'on' says to put letters next to each other.
'end of' indicates one should take the final letters.
The last letter of 'leg' is 'g'.
'bee' enclosing 'ig' is 'beige'.
(Other definitions for beige that I've seen before include "Pale sandy fawn colour", "Shade of brown", "shade", "Sandy fawn colour", "Fawn or buff", "Yellowish-brown", "Fawn-coloured", "Light brown", "Taupe" and "Pale brown".)