Yellowish-brown insect biting one on end of leg (5)
I believe the answer is:
beige
'yellowish-brown' is the definition.
(thesaurus)
'insect biting one on end of leg' is the wordplay.
'insect' becomes 'bee' (bee is a kind of insect).
'biting' indicates putting letters inside (I've seen this in other clues).
'one' becomes 'i' (Roman numeral**).
'on' means one lot of letters go next to another.
'end of' says to take the final letters.
The last letter of 'leg' is 'g'.
'i'+'g'='ig'
'bee' placed around 'ig' is 'BEIGE'.
(Other definitions for beige that I've seen before include "Taupe" , "Pale brown" , "Fawn-coloured" , "Pale sandy fawn colour" , "Shade of brown" .)