See tweeters, the pits? (5)
I believe the answer is:
caves
'the pits?' is the definition.
The definition and answer can be both natural objects as well as being plural nouns.
Maybe there's a link between them I don't understand?
'see tweeters' is the wordplay.
'see' becomes 'c' (the word for the letter, according to Chambers).
'tweeters' becomes 'aves' (I can't explain this - if you can you should give a lot more credence to this answer).
'c'+'aves'='CAVES'
Can you help me to learn more?
(Another definition for caves that I've seen is " Underground chambers".)