Ready to fight for a dream perhaps (5)
I believe the answer is:
armed
'ready to fight' is the definition.
(I've seen this before)
'a dream perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'dream' is an anagram of 'ARMED'.
'for' acts as a link.
(Other definitions for armed that I've seen before include "Prepared and equipped for a confrontation" , "Supplied with weapons" , "brachiate?" , "Being equipped with 25 Across" , "Carrying a gun" .)