Feeble swan cry shows it may be gaunt and bony (7)
I believe the answer is:
scrawny
'bony' is the definition.
(I know that bony can be written as scrawny)
'feeble swan cry shows it may be gaunt' is the wordplay.
'swan cry' anagrams to 'SCRAWNY'.
However, I'm not sure how the anagram is indicated.
'and' is the link.
Can you help me to learn more?
(Other definitions for scrawny that I've seen before include "Thin -- underfed" , "Unhealthily thin" , "Skinny" , "Being underweight" , "Skin-and-bones" .)