Make an appearance (4,2)
There are a few possibilities for this:
show up
(Other definitions for form that I've seen before include "Fitness" , "Group of schoolchildren < > construct" , "Establish" , "etiquette" , "Printed document with blank spaces for information to be inserted" .)
'make an appearance' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for come that I've seen before include "Arrive" , "See 13 across" , "Draw near" , "Turn up" , "' - - fly with me'" .)
'make an appearance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for show up that I've seen before include "Expose or keep appointment" , "Arrive - put to shame" , "Become visible" , "Arrive (for an appointment)" , "Put in appearance or expose" .)