Turn up in Beatles' first beat club (7)
I believe the answer is:
niblick
'club' is the definition.
(niblick is a kind of club)
'turn up in beatles' first beat' is the wordplay.
'turn up' shows that the letters should be reversed in order.
'first' indicates taking the first letters.
'beat' becomes 'lick' ('lick' can be a synonym of 'beat'**).
The first letter of 'beatles' is 'b'.
'in' written backwards gives 'ni'.
'ni'+'b'+'lick'='NIBLICK'
(Other definitions for niblick that I've seen before include "Old golf club" , "old-fashioned club" , "No 9 iron" , "Golf iron" , "number eight say" .)