The most common and most likely answer to this crossword clue is the 6 letter word NURSED
I've seen this crossword clue in Independent
N
U
R
S
E
D
More clues leading to the result NURSED
- Tended to turn red with sun
- Tended to run over at speed, regularly
- Shark served with last of salad was tender
- Treated shark close to mainland
- Took care of shark close to land
- Cherished sick user in state
- US nerd criminal took care of
- Was tender shark served with chard finally?
- a Tended sick shark beached finally
Buddy explains!

The straight part
We know that "took care of" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case took care of = nursed.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 NURSED mean?
NURSED verb- To breastfeed: to feed (a baby) at the breast; to suckle.
- To breastfeed: to be fed at the breast.
- To care for (someone), especially in sickness; to tend to.
- To treat kindly and with extra care
- To manage with care and economy
- To drink slowly
- To foster, to nourish
- To hold closely to one's chest
- To strike (billiard balls) gently, so as to keep them in good position during a series of shots.