Plan had name (9)
I believe the answer is:
designate
'name' is the definition.
(I know that name is a more specific form of the action label)
'plan had' is the wordplay.
'plan' becomes 'design' (synonyms).
'had' becomes 'ate' (e.g. I had an ice cream).
'design'+'ate'='DESIGNATE'
(Other definitions for designate that I've seen before include "Appoint" , "Allocate" , "Appointed but not yet in post" , "Assign" , "Identify" .)