Mercenary guerrilla never bottles uprising (5)
I believe the answer is:
venal
'mercenary' is the definition.
(both can mean purely concerned with making money)
'guerrilla never bottles uprising' is the wordplay.
'bottles' indicates a hidden word (bottling is a kind of containing).
'uprising' shows that the letters should be reversed in order.
'lanev' is hidden in the letters of 'guerrilla never'.
'lanev' in reverse letter order is 'VENAL'.
(Other definitions for venal that I've seen before include "Open to bribes" , "Influenced by bribery, corrupt" , "Easily corrupted" , "Corruptly mercenary" , "motivated by corruption" .)