Hence broadcast about a new lift (7)
I believe the answer is:
enhance
'lift' is the definition.
(lift can mean to enhance or improve)
'hence broadcast about a new' is the wordplay.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'about' indicates putting letters inside.
'new' becomes 'n' (abbreviation as in New Testament NT).
'hence' is an anagram of 'enhce'.
'a'+'n'='an'
'enhce' enclosing 'an' is 'ENHANCE'.
(Other definitions for enhance that I've seen before include "Improve the value of (something)" , "Intensify, increase or improve" , "improve things" , "Improve, add to attractiveness of" , "Improve, make more attractive" .)