Troubled mate has job getting cooperation (8)
I believe the answer is:
teamwork
'cooperation' is the definition.
(I've seen this before)
'troubled mate has job' is the wordplay.
'troubled' indicates anagramming the letters.
'has' means one lot of letters go next to another.
'job' becomes 'work' ('work' can be a synonym of 'job'**).
'mate' is an anagram of 'team'.
'team'+'work'='TEAMWORK'
'getting' acts as a link.
(Other definitions for teamwork that I've seen before include "Organised co-operation, group endeavour." , "Co-ordination" , "joint operating" , "Concert" , "Combined action of a group" .)