She works well within the group and, on the side, with competitor (4,6)
I believe the answer is:
team player
'she works well within the group and' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'the side with competitor' is the wordplay.
'the side' becomes 'team' (a side is a sporting team).
'with' says to put letters next to each other.
'competitor' becomes 'player' (I've seen this before).
'team'+'player'='TEAM PLAYER'
'on' acts as a link.
Can you help me to learn more?
(Other definitions for team player that I've seen before include "not a man without side?" , "One who works well with others" , "One working well with colleagues" , "Cooperative type" .)