Use envelopes surprisingly prepared in advance (2,4,6)
I believe the answer is:
up ones sleeve
'prepared in advance' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'use envelopes surprisingly' is the wordplay.
'surprisingly' is an anagram indicator (a surprising ordering of the letters).
'use'+'envelopes'='useenvelopes'
'useenvelopes' anagrammed gives 'UP ONES SLEEVE'.
Can you help me to learn more?
Want a hint initially instead of a full solution?
Install my app