Notice work getting into shape for a takeover (8)
I believe the answer is:
adoption
'takeover' is the definition.
(I've seen this before)
'notice work getting into shape' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'work' becomes 'op' (abbreviation for opus).
'getting' says to put letters next to each other.
'shape' is an anagram indicator.
'into' is an anagram of 'tion'.
'ad'+'op'+'tion'='ADOPTION'
'for a' is the link.
(Other definitions for adoption that I've seen before include "Legal process of taking a child into one's family" , "Appropriation from another source" , "process to select candidate" , "Endorsement" , "approval" .)