Heading for insolvency again, one has a large bill (4)
I believe the answer is:
ibis
'one has a large bill' is the definition.
I can't tell whether this definition defines the answer.
'heading for insolvency again' is the wordplay.
'heading for' suggests taking the first letters.
'again' becomes 'bis' (I've seen this in other clues).
The first letter of 'insolvency' is 'i'.
'i'+'bis'='IBIS'
Can you help me to learn more?
(Other definitions for ibis that I've seen before include "Bird venerated by ancient Egyptians" , "Wading bird sacred to the Egyptians" , "Wading bird of warm regions" , "Bird sacred in Ancient Egypt" , "Bird worshipped in Ancient Egypt" .)