The most common and most likely answer to this crossword clue is the 5 letter word NURSE
I've seen this crossword clue in The Times
N
U
R
S
E
More clues leading to the result NURSE
- Look after harbour
- Old railwaymen with points to look after
- Tend to run up banks of Seine
- Look after some revolutionary candidates running
- The shark that’s seen in harbour for a while?
- Possible source of drugs turned up E’s and whizz
- Shark appearing in harbour
- Manage to go round small European harbour
- Railwaymen once given points to look after
- Minister to fly over home counties
Buddy explains!

The straight part
We know that "The shark" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case the shark = nurse.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 NURSE mean?
NURSE noun- A wet nurse.
- A person (usually a woman) who takes care of other people’s young.
- A person trained to provide care for the sick.
- One who, or that which, brings up, rears, causes to grow, trains, or fosters.
- A shrub or tree that protects a young plant.
- A lieutenant or first officer who takes command when the captain is unfit for his place.
- A larva of certain trematodes, which produces cercariae by asexual reproduction.
- A nurse shark.
- 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.