Possible Clues:

• Took up (with)
• Sidney was not neutral over the editor
• Showed solidarity (with)
• Showed favoritism
• Word with ''blind'' or ''broad''
• Went (with) (h,h)
• Being no longer neutral, lost one's head and died
• Blind or broad attachment
• Allied oneself (with one party)
• Gave support to the team?