Shame about mole disfiguring diver (9)

I believe the answer is:

guillemot

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'diver' is the definition.
(I've seen this before)

'shame about mole disfiguring' is the wordplay.
'shame' becomes 'guilt' (I am not sure about this - if you are sure you should believe this answer much more).
'about' indicates putting letters inside.
'disfiguring' indicates an anagram (I've seen 'disfigured' mean this).
'mole' with letters rearranged gives 'lemo'.
'guilt' placed around 'lemo' is 'GUILLEMOT'.

Can you help me to learn more?

(Other definitions for guillemot that I've seen before include "Fisher" , "cliff-ledge nester" , "Diver" , "Seabird" , "Diving bird" .)

I've seen this clue in the Sydney Morning Herald.

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