King takes tourist's seat in sturdy boat (5)
I believe the answer is:
skiff
'boat' is the definition.
(I know that skiff is a type of boat)
'king takes tourist's seat in sturdy' is the wordplay.
'king' becomes 'K' (abbreviation for king in chess).
'takes' means one lot of letters goes inside another (take can mean to capture or invade).
'seat' says to take the final letters (I've seen 'seats' mean this).
'in sturdy' becomes 'iff' (I can't explain this - if you can you should give a lot more credence to this answer).
The final letter of 'tourists' is 's'.
's'+'iff'='siff'
'k' put inside 'siff' is 'SKIFF'.
Can you help me to learn more?
(Other definitions for skiff that I've seen before include "Small rowing boat" , "Small light boat" , "Light rowing boat for one person" .)