Amazed to see by the home, bats, upside-down (7)
I believe the answer is:
stunned
'amazed' is the definition.
(I know that amazed can be written as stunned)
'home bats upside-down' is the wordplay.
'home' becomes 'den' (I've seen this before).
'bats' becomes 'nuts' (synonyms).
'upside down' is a reversal indicator.
'den'+'nuts'='dennuts'
'dennuts' back-to-front is 'STUNNED'.
'to see by the' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for stunned that I've seen before include "Knocked out; astonished" , "Stupefied" , "shock" , "Taken aback" , "Amazed" .)