Rock chick shortly gets back in club (6)
I believe the answer is:
basalt
'rock' is the definition.
(basalt is a kind of rock)
'chick shortly gets back in club' is the wordplay.
'chick' becomes 'la' (I can't justify this - if you can you should believe this answer much more).
'shortly' suggests the final letters.
'back' is a reversal indicator.
'in' indicates putting letters inside.
'club' becomes 'bat' (as in sporting equipment).
The final letter of 'gets' is 's'.
'la'+'s'='las'
'las' in reverse letter order is 'sal'.
'sal' put within 'bat' is 'BASALT'.
Can you help me to learn more?
(Other definitions for basalt that I've seen before include "Type of rock is a blast, oddly" , "rock from 2 [VOLCANO]" , "Black volcanic rock" , "Dark rock of volcanic origin" , "Common volcanic rock" .)