Sailing boat in small puddles, capsized (5)
I believe the answer is:
sloop
'sailing boat' is the definition.
(type of sailing boat)
'puddles capsized' is the wordplay.
'puddles' becomes 'pools' ('pool' can be a synonym of 'puddle').
'capsized' says the letters should be written backwards (in a down clue, the word turns upside down).
'pools' back-to-front is 'SLOOP'.
'in small' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for sloop that I've seen before include "something that's rigged" , "Type of sailing boat" , "Sailing vessel with one mast" , "Single-masted sailing vessel" , "One-masted sailing boat" .)