Taking regular bites from onion, Henry VIII perhaps making a pig of himself? (7)
I believe the answer is:
oinking
'onion henry viii perhaps making a pig of himself?' is the definition.
I know that 'pig' relates to this answer.
'taking regular bites from' is the wordplay.
'taking regular' becomes 'oking' (I can't justify this - if you can you should give a lot more credence to this answer).
'bites' is an insertion indicator.
'from' becomes 'in' (I've seen this in other clues).
'oking' enclosing 'in' is 'OINKING'.
Can you help me to learn more?
(Other definitions for oinking that I've seen before include "Sound from pen" , "farmyard noises" , "Noise from Tamworth" .)