Getting crumpled when one’s reconnoitring outside again (8)
I believe the answer is:
creasing
'getting crumpled' is the definition.
I can't tell whether this defines the answer.
'one's reconnoitring outside again' is the wordplay.
'one's reconnoitring' becomes 'casing' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'outside' means one lot of letters goes inside another (some letters go outside others).
'again' becomes 're' (prefix meaning 'again').
'casing' going around 're' is 'CREASING'.
'when' is the link.
Can you help me to learn more?
(Other definitions for creasing that I've seen before include "crumpling" , "folding" .)