Insect of which the scarab is one example (4,6)

'insect' is the definition.
(dung beetle is a kind of insect)

'which the scarab is one example' is the wordplay.
I cannot quite understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'is' could be 'be' and 'be' is found in the answer.
'one' could be 'un' (northern English dialect form of 'one') and 'un' is found in the answer.
This explanation may well be incorrect...

'of' is the link.

Can you help me to learn more?