NHS worker on line in creche (7)
I believe the answer is:
nursery
'creche' is the definition.
(I've seen this before)
'nhs worker on line' is the wordplay.
I cannot really understand how this works, but
'worker' could be 'nurse' (I have seen 'Medical worker ' mean 'nurse' so perhaps 'worker' could also mean 'nurse') and 'nurse' is located in the answer.
'line' could be 'ry' (abbreviation for railway) and 'ry' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for nursery that I've seen before include "but not elders?" , "Child care centre" , "Growing environment for plants or children" , "Place for young people and young plants" , "Place to rear plants" .)