Trouble around one boy's communication (7)
I believe the answer is:
liaison
'communication' is the definition.
(liaison is a kind of communication)
'trouble around one boy's' is the wordplay.
'trouble' becomes 'ail' (synonyms).
'around' says the letters should be written backwards.
'one' becomes 'I' (Roman numeral).
'boy' becomes 'son' (synonyms).
'ail' backwards is 'lia'.
'lia'+'i'+'son'='LIAISON'
(Other definitions for liaison that I've seen before include "entanglement" , "Usually secretive or illicit relationship" , "Intimate relationship" , "Mil. coordination; illicit affair" , "Fling - intrigue" .)