Speaker and small bird (7)
I believe the answer is:
tweeter
This clue could be a double definition.
'speaker' is the first definition.
(tweeter is a type of loud speaker)
'small bird' is the second definition.
'tweeter' can be an answer for 'bird'. I'm unsure of the 'small' bit.
'and' is the link.
Can you help me to learn more?
(Other definitions for tweeter that I've seen before include "piece of hi-fi" , "High-frequency speaker" , "highly effective in reproducing sound" , "One relaying notes" , "Message sender" .)