Exchange views on field event with son (7)
I believe the answer is:
discuss
'exchange views on' is the definition.
(to discuss something is to exchange views on it)
'field event with son' is the wordplay.
'field event' becomes 'discus' (discus is a kind of field event).
'with' means one lot of letters go next to another.
'son' becomes 's' (genealogical abbreviation for son).
'discus'+'s'='DISCUSS'
(Other definitions for discuss that I've seen before include "Go into" , "Argue" , "Talk about (something)" , "Take up" , "Consider" .)