The most common and most likely answer to this crossword clue is the 6 letter word THEMED
I've seen this crossword clue in Financial Times
T
H
E
M
E
D
More clues leading to the result THEMED
- Tough to take in edging with thread?
- Sea with a unifying idea
- Like some parties in sea around Malta
- The sea full of similar elements
- Where the I’s are found and what I’s are
- Nice view? Some parts are like that
- Some loathe media having a recurring motif
- Where Rhodes and Majorca are similarly grouped?
- Goethe Medal has focused on single subject …
- Favourite place for cruisers focussed on one subject
Buddy explains!

The straight part
We know that "full of similar elements" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case full of similar elements = themed.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 THEMED mean?
THEMED verb- To give a theme to.
- To apply a theme to; to change the visual appearance and/or layout of (software).
- (often in combination) Having a particular theme or topic