Choose section of top table (3)
I believe the answer is:
opt
'choose' is the definition.
(both can mean to pick something)
'section of top table' is the wordplay.
'section of' says the answer is hidden in the clue.
'OPT' can be found hidden inside 'top table'.
(Other definitions for opt that I've seen before include "Prefer, choose" , "Hold in the highest esteem" , "Decide between possibilities, choose" , "Choose from pot" , "Have preference for something" .)