The most common and most likely answer to this crossword clue is the 6 letter word FORTES
I've seen this crossword clue in Financial Times
F
O
R
T
E
S
Buddy explains!

The straight part
We know that "strong points" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case strong points = fortes.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 FORTES mean?
FORTES noun- A strength or talent.
- The strong part of a sword blade, close to the hilt.
- A passage in music to be played loudly; a loud section of music.
- A fortis consonant.