The most common and most likely answer to this crossword clue is the 12 letter word THEMATICALLY
I've seen this crossword clue in Financial Times
T
H
E
M
A
T
I
C
A
L
L
Y
Buddy explains!
The straight part
We know that "along with similar types" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case along with similar types = thematically.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 THEMATICALLY mean?
THEMATICALLY adverb- In a thematic manner