It will have an enormous bill to face (6)
I believe the answer is:
toucan
'it will' is the definition.
The definition suggests a singular noun which matches the answer.
'an enormous bill to face' is the wordplay.
I cannot really understand how this works, but
'an' could be 'a' and 'a' is present in the answer.
'to' is found in the answer.
This explanation may well be incorrect...
'have' is the link.
Can you help me to learn more?
(Other definitions for toucan that I've seen before include "Bird with large colourful beak" , "Large-beaked bird" , "A pair could be able for this bird, by the sound of it" , "One with huge bill" , "Colourful bird, big bill" .)