Not all got tan naturally, turning an orange colour (7)
I believe the answer is:
annatto
'orange colour' is the definition.
The definition suggests a singular noun which matches the answer.
'not all got tan naturally turning' is the wordplay.
'not all' indicates the answer is hidden within the clue (only some of the letters).
'turning' shows that the letters should be reversed in order.
'ottanna' is hidden within 'got tan naturally'.
'ottanna' in reverse letter order is 'ANNATTO'.
'an' is the link.
Can you help me to learn more?
(Other definitions for annatto that I've seen before include "Colouring matter" , "dyestuff" , "Orange-red dye" , "Food dye from red pulp of tropical fruit" , "food colouring" .)