West End spot we arranged for dance (3-4)
I believe the answer is:
two-step
'dance' is the definition.
(two-step is a kind of dance)
'west end spot we arranged' is the subsidiary indication.
'end' suggests the final letters.
'arranged' indicates anagramming the letters.
The last letter of 'west' is 't'.
'spot'+'we'='spotwe'
'spotwe' is an anagram of 'wostep'.
't'+'wostep'='twostep'
'for' is the link.
(Other definitions for two-step that I've seen before include "Old time dance" , "Gliding dance" , "Old-time dance in duple time" , "Wet pots (anag.)" , "Dance, maybe military" .)