Methinks there's no ink that contains a violet dye (5)
I believe the answer is:
meths
'contains a violet dye' is the definition.
I can't judge whether this definition defines the answer.
'methinks there's no ink' is the wordplay.
'there's no' suggests deleting specific letters.
'methinks' with 'ink' taken out is 'METHS'.
'that' acts as a link.
Can you help me to learn more?
(Other definitions for meths that I've seen before include "Methylated spirits (colloq.)" , "unsuitable alcohol" , "Violet-coloured alcohol" , "Fuel" , "Spirit" .)