Changes direction to incorporate most of new appearances (7)
I believe the answer is:
veneers
'appearances' is the definition.
(veneer can mean a superficial appearance)
'changes direction to incorporate most of new' is the wordplay.
'changes direction' becomes 'veers' (I've seen this before).
'to incorporate' indicates putting letters inside.
'most of' means to remove the last letter.
'new' with its last letter removed is 'ne'.
'veers' enclosing 'ne' is 'VENEERS'.
(Other definitions for veneers that I've seen before include "Fine wood facings" , "Coatings of a thin layers of superior quality" , "Superficial overlays" , "Thin wooden sheets" .)