Chicken giant (5)
I believe the answer is:
tyson
'chicken giant' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tyson that I've seen before include "26 4 [RING MASTER]" , "US world heavyweight boxing champion, b.1966 -- English fast bowler, d. 2015" , "American world heavyweight champion, b. 1966" , "Youngest ever undisputed world heavyweight boxing champion, b, 1966" , "Mike --, US boxer" .)