Count late manoeuvring as revealing (8)
I believe the answer is:
telltale
'revealing' is the definition.
('telltale' can be a synonym of 'revealing')
'count late manoeuvring' is the wordplay.
'count' becomes 'tell' (I've seen this before).
'manoeuvring' indicates an anagram.
'late' is an anagram of 'tale'.
'tell'+'tale'='TELLTALE'
'as' is the link.
(Other definitions for telltale that I've seen before include "Blabbing person" , "One spreads other people's secrets" , "Revealing or indicating something, like blabbermouth" , "Revelatory - blabbermouth" , "Revealing indicator or sneak" .)