Give incentive to team playing around four (8)
I believe the answer is:
motivate
'give incentive' is the definition.
'to team playing around four' is the wordplay.
'playing' is an anagram indicator.
'around' means one lot of letters goes inside another.
'four' becomes 'iv' ('IV' can be a synonym of 'four').
'to'+'team'='toteam'
'toteam' anagrammed gives 'motate'.
'motate' placed around 'iv' is 'MOTIVATE'.
(Other definitions for motivate that I've seen before include "Drive on" , "Give an incentive for action" , "Stimulate the interest of" , "Prompt" , "Induce" .)