Chaos from prisoner marrying (9)
I believe the answer is:
confusion
'chaos' is the definition.
(I've seen this before)
'prisoner marrying' is the wordplay.
'prisoner' becomes 'con' (abbreviation for 'convict').
'marrying' becomes 'fusion' (a fusion is a merging or marrying of two things).
'con'+'fusion'='CONFUSION'
'from' acts as a link.
(Other definitions for confusion that I've seen before include "Perplexity" , "Uncertainty" , "Discombobulation, disarray" , "Bewilderment - disorder" , "Chaos" .)