We see no dancer waving arms (8)
I believe the answer is:
ordnance
'arms' is the definition.
(ordnance is a kind of arms)
'we see no dancer waving' is the wordplay.
'we' becomes 'o' (I can't explain this - if you can you should give a lot more credence to this answer).
'see no' becomes 'n' (common abbreviation).
'waving' indicates anagramming the letters (letters wave around).
'n'+'dancer'='ndancer'
'ndancer' is an anagram of 'rdnance'.
'o'+'rdnance'='ORDNANCE'
(Other definitions for ordnance that I've seen before include "regulation" , "The Survey provides maps" , "Military supplies and materials" , "weaponry" , "Mounted guns, cannon" .)