Remains with company after start of critical week? It’s a profitable business (4,3)
I believe the answer is:
cash cow
'a profitable business' is the definition.
(I've seen this before)
'remains with company after start of critical week?' is the wordplay.
'remains with' becomes 'ash' (remains of a fire. I am not sure about the 'with' bit.).
'company' becomes 'co' (abbreviation).
'after' is a charade indicator (letters next to each other).
'start of' indicates taking the first letters.
'week?' becomes 'w' (abbreviation).
The first letter of 'critical' is 'c'.
'ash'+'co'='ashco'
'ashco' put after 'c' is 'cashco'.
'cashco'+'w'='CASH COW'
'it's' is the link.
Can you help me to learn more?
(Other definitions for cash cow that I've seen before include "troublefree business?" , "Saw choc (anag.); steady investment" , "Lucrative investment" , "profitable business" , "E.g. business milked for money" .)