The most common and most likely answer to this crossword clue is the 2 plus 3 plus 4 letter word IN ANY CASE
I've seen this crossword clue in The Guardian
I
N
A
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Y
C
A
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More clues leading to the result IN ANY CASE
- Ace inn, say, demolished regardless
- Where one might find travel items, whatever happens
- Whatever happens, it’s foolish to recruit unknown accountants
- Silly welcoming corrupt leader in backward state, moreover
- No matter where and how you pack – whatever!
- Silly saving last bit in doggy bag, upended regardless
- Where a customs officer may search, no matter what?
- Where customs officers may search, whatever happens
- Silly housing money withdrawn from hostels, however
- In New York, seen wearing a suit, no matter what
Buddy explains!

The straight part
We know that "moreover" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case moreover = in any case.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.