Lots of liquid rising in vessel (5)
I believe the answer is:
sloop
'vessel' is the definition.
(I know that sloop is a type of sailing ship)
'lots of liquid rising in' is the wordplay.
'lots' means to remove the last letter (I've seen 'lots of' mean this (the majority of the word)).
'liquid' becomes 'pols' (I am not sure about this - if you are sure you should believe this answer much more).
'rising' is a reversal indicator (going up in a down clue).
'in' indicates putting letters inside.
'pols' reversed gives 'slop'.
'of' with its final letter taken away is 'o'.
'o' placed into 'slop' is 'SLOOP'.
Can you help me to learn more?
(Other definitions for sloop that I've seen before include "Single-masted sailing vessel" , "'----- John B', 1966 Beach Boys' hit" , "Vessel with a single mast" , "one going to sea" , "Type of sailing boat" .)