Girl brought up too much dye (7)
I believe the answer is:
annatto
'dye' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?
'girl brought up too much' is the wordplay.
'girl' becomes 'anna' ().
'brought up' says the letters should be written in reverse (in a down clue, letters go up).
'too much' becomes 'ott' (short for over the top).
'ott' in reverse letter order is 'tto'.
'anna'+'tto'='ANNATTO'
Can you help me to learn more?
(Other definitions for annatto that I've seen before include "Orange colouring" , "Colouring matter" , "Food colourant" , "Orange-red dye" , "dyestuff" .)