List must include ordinary farmyard bird (7)
I believe the answer is:
rooster
'farmyard bird' is the definition.
(male fowl)
'list must include ordinary' is the wordplay.
I cannot quite see how this works, but
'ordinary' could be 'o' (abbreviation e.g. O-Levels) and 'o' is found within the answer.
'list' could be 'roster' (roster is a kind of list) and 'roster' is found in the leftover letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for rooster that I've seen before include "Adult male chicken" , "Bird that wakes up" , "Early-morning caller" , "So retro (anag.)" , "Farmyard fowl" .)