The team-leader requests jobs (5)
I believe the answer is:
tasks
'jobs' is the definition.
(I know this)
'the team-leader requests' is the wordplay.
'leader' suggests taking the first letters.
'requests' becomes 'asks' ('ask' can be a synonym of 'request').
The initial letter of 'team' is 't'.
't'+'asks'='TASKS'
(Other definitions for tasks that I've seen before include "Chores, undertakings" , "Missions" , "Labours" , "Chores, duties" , "Pieces of work" .)