No slackers prepared to show solidarity (5,5)
I believe the answer is:
close ranks
'show solidarity' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'no slackers prepared' is the wordplay.
'prepared' indicates an anagram.
'no'+'slackers'='noslackers'
'noslackers' with letters rearranged gives 'CLOSE RANKS'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for close ranks that I've seen before include "to put taxi firms out of business?" , "Unite as a defensive measure" , "Display solidarity" , "make cabbies go out of business?" , "Unite in order to defend common interests" .)