Kiss in tense film script (4)
I believe the answer is:
text
'script' is the definition.
(both mean writing)
'kiss in tense film' is the wordplay.
'kiss' becomes 'x' (X can represent a kiss).
'in' means one lot of letters goes inside another.
'tense' becomes 't' (abbreviation used in many dictionaries).
'film' becomes 'et' (E.T. the Extra-Terrestrial).
't'+'et'='tet'
'x' going into 'tet' is 'TEXT'.
(Other definitions for text that I've seen before include "'Words, not illustrations (4)'" , "Send a written message by phone" , "Written communication" , "Wording" , "Writing or printing" .)