European beginning to booze in cheap joint (5)
I believe the answer is:
elbow
'joint' is the definition.
(I know that elbow is a type of ginglymus)
'european beginning to booze in cheap' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'beginning to' says to take the initial letters.
'in' indicates putting letters inside.
'cheap' becomes 'low'.
The initial letter of 'booze' is 'b'.
'b' going within 'low' is 'lbow'.
'e'+'lbow'='ELBOW'
(Other definitions for elbow that I've seen before include "Sort of grease" , "Nudge" , "Below (anag.)" , "given to one about to leave" , "Barge" .)