Bird with leg in something mouldy (7)
I believe the answer is:
stilton
'something mouldy' is the definition.
I can't tell whether this definition defines the answer.
'bird with leg' is the wordplay.
'bird' becomes 'stilt' (stilt is a kind of bird).
'with' means one lot of letters go next to another.
'leg' becomes 'on' (cricket term, fielding positions).
'stilt'+'on'='STILTON'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for stilton that I've seen before include "Strong English cheese, originally from Leicestershire" , "Blue 8 across" , "Cheese named after Cambridgeshire town" , "rich food?" , "English cheese, usually veined" .)