One with large bill in place that's derelict (7)
I believe the answer is:
pelican
'one with large bill' is the definition.
The definition and answer can be both animals as well as being singular nouns.
Maybe there's an association between them I don't understand?
'in place that's derelict' is the wordplay.
'that's derelict' indicates anagramming the letters (a derelict or broken spelling).
'in'+'place'='inplace'
'inplace' is an anagram of 'PELICAN'.
Can you help me to learn more?
(Other definitions for pelican that I've seen before include "In place (anag.)" , "Does its beak hold more that its belly can?" , "Aquatic, billed bird" , "Large-billed seabird" , "Bird with large pouched beak" .)