The most common and most likely answer to this crossword clue is the 7 letter word REGALIA
R
E
G
A
L
I
A
More clues leading to the result REGALIA
- Artilleryman keeping agile, having moved royal insignia
- Finery originally introduced in army corps celebration
- Algeria destroyed symbols of royalty
- Turning up in mail: a German's ceremonial robes
- A1 drink knocked back in Crown & Sceptre
- Finery of sporting gear worn by boxer
- Crown, sceptre and grail are mysterious without king
- Backed excellent drink with this cigar
- One for the road possibly knocked back in the Crown and Sceptre?
- Excellent beer sent round in Crown & Sceptre?
Buddy explains!

The straight part
We know that "symbols of royalty" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case symbols of royalty = regalia.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 REGALIA mean?
REGALIA noun- A kind of large cigar of superior quality.
- Royal rights, prerogatives and privileges actually enjoyed by any sovereign, regardless of his title (emperor, grand duke etc.).
- The emblems, symbols, or paraphernalia indicative of royalty or any other sovereign status; such as a crown, orb, sceptre or sword.
- Decorations or insignia indicative of an office or membership of an order or society; such as freemasonry.
- (by extension) Finery, magnificent dress, or lavish or flashy costume.
- (by extension) Sumptuous food.