The most common and most likely answer to this crossword clue is the 7 letter word WIGGING
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Buddy explains!
The straight part
We know that "Reprimand" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case reprimand = wigging.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 WIGGING mean?
WIGGING verb- To put on a wig; to provide with a wig (especially of an actor etc.).
- To upbraid, reprimand.
- To become extremely emotional or excitable; to lose control of one's emotions.
- The action of the verb to wig.
- A telling-off or reprimand.
- The practice of male stuntmen performing for actresses.