Nibble at a bit of Brighton rock? (5)
I believe the answer is:
erode
'brighton rock?' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how they can define each other.
'nibble at a bit' is the wordplay.
I cannot really see how this works, but
'bit' could be 'o' (resembles 0, a binary digit or bit) and 'o' is located in the answer.
The remaining letters 'erde' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for erode that I've seen before include "Grind down" , "Wear away with weather" , "Abrade" , "Slowly remove" , "Eat away" .)