The Spanish show respect in joint (5)
I believe the answer is:
elbow
'joint' is the definition.
(joint of the body)
'the spanish show respect' is the wordplay.
'the spanish' becomes 'el' ('the' in Spanish).
'show respect' becomes 'bow' (somebody may bow to show respect).
'el'+'bow'='ELBOW'
'in' acts as a link.
(Other definitions for elbow that I've seen before include "Nudge" , "sack?" , "push" , "Reject" , "Below (anag.)" .)