In greater frenzy to get red dye (6)
I believe the answer is:
madder
'dye' is the definition.
(thesaurus)
'in greater frenzy to get red' is the wordplay.
I cannot quite see how this works, but
an anagram of 'red' is 'der' which is present in the answer.
The remaining letters 'mad' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for madder that I've seen before include "Dye-yielding plant" , "more bananas" , "More wild; plant yielding red dye" , "Made even more angry by the red dye" , "More disturbed - plant" .)