Take midday meal around a vessel (6)
I believe the answer is:
launch
'a vessel' is the definition.
(launch is a type of motorboat)
'take midday meal around' is the wordplay.
'take midday' becomes 'a' (I can't justify this - if you can you should give a lot more credence to this answer).
'meal' becomes 'lunch' (lunch is a kind of meal).
'around' is an insertion indicator.
'a' put into 'lunch' is 'LAUNCH'.
Can you help me to learn more?
(Other definitions for launch that I've seen before include "Embark" , "Send on course, ship or book" , "Send out; motor boat" , "pleasure-boat" , "Set up - found" .)