Born sun-tanner I fancy is a shade of brown (5,6)
I believe the answer is:
burnt sienna
'a shade of brown' is the definition.
(I've seen this before)
'born sun-tanner i fancy' is the wordplay.
'born' becomes 'b' (abbreviation next to the year of someone's birth).
'fancy' is an anagram indicator.
'sun'+'tanner'+'i'='suntanneri'
'suntanneri' is an anagram of 'urntsienna'.
'b'+'urntsienna'='BURNT SIENNA'
'is' is the link.
(Other definitions for burnt sienna that I've seen before include "brown, but a bit red" , "Shade of brown" , "Reddish-brown pigment" , "Earthy tone" , "Deep red-brown pigment" .)