Remember what visiting baby-sitters do (4,2,4)
I believe the answer is:
call to mind
'remember' is the definition.
(I've seen this in another clue)
'visiting baby-sitters do' is the wordplay.
I cannot quite understand how this works, but
'visiting' could be 'in' and 'in' is found within the answer.
This explanation may well be incorrect...
'what' is the link.
Can you help me to learn more?
(Other definitions for call to mind that I've seen before include "Cause to be remembered" , "Recollect" , "Remember" .)