Brown covers it for huge man (5)
I believe the answer is:
titan
'huge man' is the definition.
'titan' can be an answer for 'man' (I have seen 'Great man' mean 'titan' so perhaps 'man' could also mean 'titan'). I'm unsure of the 'huge' bit.
'brown covers it' is the wordplay.
'brown' becomes 'tan' (tan is a kind of brown).
'covers' means one lot of letters goes inside another.
'tan' going around 'it' is 'TITAN'.
'for' is the link.
Can you help me to learn more?
(Other definitions for titan that I've seen before include "Taint (anag.)" , "A son of Uranus and Gaea" , "Taint in a mythical giant" , "Person of great importance" , "Old Greek god or very strong person" .)