When the wrong pair gets left? (5)
I believe the answer is:
april
'when the' is the definition.
I can't judge whether this definition defines the answer.
'wrong pair gets left?' is the wordplay.
'wrong' indicates an anagram.
'gets' says to put letters next to each other.
'left?' becomes 'l' (common abbreviation).
'pair' anagrammed gives 'apri'.
'apri'+'l'='APRIL'
Can you help me to learn more?
(Other definitions for april that I've seen before include "Calendar month" , "All in the ..... evening (song)" , "whose first date is foolish?" , "Spring month" , "First month of the year with 30 days" .)