Cryptic crossword clue
Up-to-date training given to hero 2,3,6

The most common and most likely answer to this crossword clue is the 2 plus 3 plus 6 letter word IN THE GROOVE

I've seen this crossword clue in Financial Times
I
N
T
H
E
G
R
O
O
V
E

Buddy explains!

The straight part
We know that "Up-to-date" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case up-to-date = in the groove.
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.

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