Some of the meekest, relatively rare birds? A small falcon? (7)
I believe the answer is:
kestrel
'a small falcon?' is the definition.
(I've seen this in another clue)
'some of the meekest relatively rare' is the wordplay.
'some of' indicates the answer is hidden within the clue.
'KESTREL' can be found hidden inside 'meekest relatively rare'.
'birds?' is the link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for kestrel that I've seen before include "Falcon that hovers" , "Small type of falcon" , "High flier" , "Small species of falcon" , "Falco tinnuculus" .)