Passion reduced with male for company (4)
I believe the answer is:
firm
'for company' is the definition.
(firm can mean a company or business)
'passion reduced with male' is the wordplay.
'passion' becomes 'fire' (fire is a kind of passion).
'reduced' means to remove the last letter.
'with male' becomes 'm' (common abbreviation. I am not sure about the 'with' bit.).
'fire' with its last letter removed is 'fir'.
'fir'+'m'='FIRM'
Can you help me to learn more?
(Other definitions for firm that I've seen before include "Organization" , "Company - stable" , "'Solid, unyielding (4)'" , "Company; steady" , "Steady and unyielding, like business organisation" .)