The most common and most likely answer to this crossword clue is the 12 letter word CONCENTRATED
I've seen this crossword clue in The Guardian
C
O
N
C
E
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T
R
A
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D
More clues leading to the result CONCENTRATED
- Decent carton redesigned and made stronger
- Prisoner with money judged to be focused
- Need contract revised but not watered down
- Caught dace on Trent when spinning intensified
- Study coin and diamonds, gathering value is reduced
- Deep thought
- Intense offender, ready to face judge, departs
- Focused study needing minimal money deemed very good
- Focussed on a misleading description of homeopathic product?
Buddy explains!

The straight part
We know that "focused" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case focused = concentrated.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 CONCENTRATED mean?
CONCENTRATED verb- To bring to, or direct toward, a common center; to unite more closely; to gather into one body, mass, or force.
- To increase the strength and diminish the bulk of, as of a liquid or an ore; to intensify, by getting rid of useless material; to condense.
- To approach or meet in a common center; to consolidate.
- To focus one's thought or attention (on).
- Not dilute; having a high concentration.
- Intense; directed towards a specific location.