Crack and Charlie given up (5)
I believe the answer is:
cleft
'crack' is the definition.
(I know that crack can be written as cleft)
'charlie given up' is the wordplay.
'charlie' becomes 'C' (phonetic alphabet: alpha, bravo, charlie etc.).
'given' is a charade indicator (letters next to each other).
'up' becomes 'left' (I am not sure about this - if you are sure you should believe this answer much more).
'c'+'left'='CLEFT'
'and' is the link.
Can you help me to learn more?
(Other definitions for cleft that I've seen before include "Chin split" , "Space" , "Split; fissure" , "chasm" , "Crack" .)