Peacekeepers under attack left boxed in without a strategy (9)
I believe the answer is:
unplanned
'peacekeepers under attack left boxed in without a strategy' is the definition.
I can't tell whether this defines the answer.
'peacekeepers under attack left boxed in without a strategy' is the wordplay.
'peacekeepers' becomes 'UN' (United Nations, peacekeeping organisation).
'under attack left boxed in' becomes 'ned' (I can't justify this - if you can you should believe this answer much more).
'without' means one lot of letters goes inside another ('without' can be similar in meaning to 'outside').
'a strategy' becomes 'plan' (a strategy is a plan or tactic).
'un'+'ned'='unned'
'unned' going around 'plan' is 'UNPLANNED'.
Can you help me to learn more?
(Other definitions for unplanned that I've seen before include "Not prearranged" , "Unintended" , "Not designed or premeditated" , "Not arranged or considered" , "Not thought out in advance" .)