Nicely brown, go and dance! (5)
I believe the answer is:
tango
'dance' is the definition.
(Tango is a dance)
'nicely brown go' is the wordplay.
'nicely brown' becomes 'tan' (tan is a kind of brown. I am not sure about the 'nicely' bit.).
'tan'+'go'='TANGO'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for tango that I've seen before include "Rhythmic movement" , "Activity requiring two to" , "Dance music" , "Dramatic ballroom dance from Argentina" , "Ballroom dance (for two?)" .)