Drink before detailed pole dance (5)
I believe the answer is:
rumba
'dance' is the definition.
(rumba is a type of dance)
'drink before detailed pole' is the wordplay.
'drink' becomes 'rum' (rum is a kind of drink).
'before' says to put letters next to each other.
'detailed' means to remove the last letter (the tail of the word is removed).
'pole' becomes 'bar' (both can mean a metal rod).
'bar' with its final letter removed is 'ba'.
'rum'+'ba'='RUMBA'
(Other definitions for rumba that I've seen before include "music one can dance to" , "Rhythmic dance of Cuban origin" , "South American dance" , "Cuban folk-dance" , "one's on the floor for it" .)