The most common and most likely answer to this crossword clue is the 8 letter word MATINEES
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More clues leading to the result MATINEES
Buddy explains!

The straight part
We know that "early performances" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case early performances = matinees.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 MATINEES mean?
MATINEES noun- A showing of a movie, sporting event, or theatrical performance in the morning or afternoon.
- A woman's dress to be worn in the morning or before dinner.
- To put on a matinee performance (of).