Evidence of settlement upset man in rainforest on vacation (7)
I believe the answer is:
receipt
'evidence of settlement' is the definition.
'receipt' can be an answer for 'evidence' (I have seen 'Evidence of sale' mean 'receipt' so perhaps 'evidence' could also mean 'receipt'). I am unsure of the 'of settlement' bit.
'upset man in rainforest on vacation' is the wordplay.
'upset' says the letters should be written backwards.
'man' becomes 'piece' (synonyms).
'in' is an insertion indicator.
'on vacation' means to remove the middle letters (after the inside letters have vacated the word).
'rainforest' with its middle removed is 'rt'.
'piece' in reverse letter order is 'eceip'.
'eceip' put within 'rt' is 'RECEIPT'.
Can you help me to learn more?
(Other definitions for receipt that I've seen before include "A written acknowledgement; a word used in the first ever 2 dn" , "Getting" , "given for payment" , "Proof of purchase" , "Formally acknowledge" .)