Forget your woes — plug in the mobile (7,2)
I believe the answer is:
lighten up
'forget your woes' is the definition.
(lighten up can mean to forget one's worries)
'plug in the mobile' is the wordplay.
'mobile' indicates an anagram.
'plug'+'in'+'the'='pluginthe'
'pluginthe' is an anagram of 'LIGHTEN UP'.
(Other definitions for lighten up that I've seen before include "Plug in the fire" , "Unwind" , "Chill" , "Relax!" .)