Broadcast skirmish, so touch up pictures (8)
I believe the answer is:
airbrush
'touch up pictures' is the definition.
(airbrush can mean to improve a photograph)
'broadcast skirmish' is the wordplay.
'broadcast' becomes 'air' (to air on TV).
'skirmish' becomes 'brush' (synonyms).
'air'+'brush'='AIRBRUSH'
'so' is the link.
(Other definitions for airbrush that I've seen before include "Doctor photographs etc" , "Improve the image" , "Sort of spray" , "change photo?" , "Prettify - alter a photo" .)