Tease endlessly over trouser bottom (4)
I believe the answer is:
seat
'bottom' is the definition.
(I know that bottom can be written as seat)
'tease endlessly over trouser' is the wordplay.
'endlessly' indicates the central letters (the ends of the words are removed).
'over' indicates an anagram.
'trouser' becomes 't' (this could be a standard abbreviation of which I'm unaware).
The centre of 'tease' is 'eas'.
'eas' with letters rearranged gives 'sea'.
'sea'+'t'='SEAT'
Can you help me to learn more?
(Other definitions for seat that I've seen before include "Box ---, position of advantage" , "Constituency; location" , "Settle in" , "MP's constituency" , "Behind" .)