United supporters recalled chaos on US tour? (5)
I believe the answer is:
snafu
'chaos on us tour?' is the definition.
(US military term for a fiasco)
'united supporters recalled' is the wordplay.
'united' becomes 'U' (abbreviation).
'supporters' becomes 'fans' (fan is a kind of supporter).
'recalled' says the letters should be written backwards.
'u'+'fans'='ufans'
'ufans' reversed gives 'SNAFU'.
(Other definitions for snafu that I've seen before include "Slangy acronym meaning in total confusion" , "Chaotic situation" , "chaos, as usual" , "Customary confusion" , "confused activity" .)