Reverse target, accepting a long tricky colour (8)
I believe the answer is:
magnolia
'colour' is the definition.
(I have seen 'Creamy colour ' mean 'magnolia' so perhaps 'colour' could also mean 'magnolia')
'reverse target accepting a long tricky' is the wordplay.
'reverse' shows that the letters should be reversed in order.
'target' becomes 'aim' ('aim' can be a synonym of 'target'**).
'accepting' means one lot of letters goes inside another.
'tricky' indicates anagramming the letters.
'aim' written backwards gives 'mia'.
'a'+'long'='along'
'along' is an anagram of 'agnol'.
'mia' going around 'agnol' is 'MAGNOLIA'.
(Other definitions for magnolia that I've seen before include "Omani lag (anag)" , "Early-blooming tree; off-white colour" , "shrub with pretty flowers" , "Flowering tree; light pinkish white" , "bush" .)