Tabby is prepared to look after another's young (4-3)
I believe the answer is:
baby-sit
'look after another's young' is the definition.
I can't tell whether this defines the answer.
'tabby is prepared' is the wordplay.
'prepared' indicates an anagram.
'tabby'+'is'='tabbyis'
'tabbyis' anagrammed gives 'BABY-SIT'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for baby-sit that I've seen before include "Tend" , "Look after young children" , "Look after a young child" , "Look after children temporarily" , "Take charge to allow parents to go out" .)