Provide milk for lost cat recently found outside (7)
I believe the answer is:
lactate
'provide milk' is the definition.
(to lactate is to produce milk)
'lost cat recently found outside' is the wordplay.
'lost' is an anagram indicator.
'recently' becomes 'late' (of late).
'found outside' is an insertion indicator.
'cat' with letters rearranged gives 'act'.
'act' going within 'late' is 'LACTATE'.
'for' acts as a link.
(Other definitions for lactate that I've seen before include "Exude milk" , "(Of female mammal) secrete milk" , "Produce milk" .)