Reduction in previous tension, happy to follow premier of long film (3-2)
I believe the answer is:
let-up
'reduction in previous tension happy to follow premier of long film' is the definition.
I can't tell whether this defines the answer.
'happy to follow premier of long film' is the wordplay.
I cannot quite see how this works, but
'happy' could be 'up' (I've seen this in other clues) and 'up' is present in the answer.
'long' could be 'l' and 'l' is present in the answer.
'film' could be 'et' (E.T. the Extra-Terrestrial) and 'et' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for let-up that I've seen before include "Respite, relief" , "Decline" , "Pause, temporary respite" , "Relieving pause" , "Abatement" .)