Left with son before head causes scene (9)
I believe the answer is:
landscape
'scene' is the definition.
(I've seen this before)
'left with son before head' is the wordplay.
'left' becomes 'l' (common abbreviation).
'with' becomes 'and'.
'son' becomes 's' (genealogical abbreviation for son).
'before' says to put letters next to each other.
'head' becomes 'cape' (both can mean a piece of land jutting over the sea).
'l'+'and'+'s'+'cape'='LANDSCAPE'
'causes' is the link.
(Other definitions for landscape that I've seen before include "Type of painting" , "Views" , "improve grounds" , "Painters may paint it" , "Artwork" .)