Mock seat layout, to a point (5)
I believe the answer is:
tease
'mock' is the definition.
(teasing is a kind of mocking)
'seat layout to a point' is the wordplay.
'layout' indicates anagramming the letters (an alternative layout of the letters).
'to a point' becomes 'e' (compass point).
'seat' is an anagram of 'teas'.
'teas'+'e'='TEASE'
(Other definitions for tease that I've seen before include "Torment, tantalise" , "Banter, make gentle fun of" , "Torment for fun" , "Gently rib" , "Torment lightly" .)