Al Pacino's beginning comeback with new project (4)
I believe the answer is:
plan
'project' is the definition.
(I know that project can be written as plan)
'al pacino's beginning comeback with new' is the wordplay.
'beginning' suggests taking the first letters.
'comeback' says the letters should be written in reverse.
'with' means one lot of letters go next to another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
The first letter of 'pacino' is 'p'.
'al'+'p'='alp'
'alp' in reverse letter order is 'pla'.
'pla'+'n'='PLAN'
(Other definitions for plan that I've seen before include "Project" , "Scheme - map" , "Programme" , "Devise a strategy" , "Map; intention" .)