Crossword Genius

Free cinema popcorn - initially consumed for free (10)

Ross

I believe the answer is:

'free' is the definition.
(thesaurus)

'free cinema popcorn initially consumed' is the wordplay.
'free' indicates an anagram.
'initially' indicates taking the first letters.
'consumed' becomes 'ate' (eating is a kind of consuming).
The initial letter of 'popcorn' is 'p'.
'cinema' with letters rearranged gives 'emanci'.
'emanci'+'p'+'ate'='EMANCIPATE'

'for' is the link.

(Other definitions for emancipate that I've seen before include "setting free", "Set free", "Free from slavery", "Liberate", "release".)