The most common and most likely answer to this crossword clue is the 4 plus 5 letter word TIME LAPSE
I've seen this crossword clue in The Guardian
T
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Buddy explains!
The straight part
We know that "Technique when shooting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case technique when shooting = time lapse.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TIME LAPSE mean?
TIME LAPSE adjective- Of or relating to a technique in which exposures are taken at fewer intervals than usual so that, on playback, a naturally slow process may be viewed at an accelerated pace