Animal with endless German ordnance: agree to confiscate that (10)
I believe the answer is:
chimpanzee
'animal' is the definition.
(I've seen this before)
'endless german ordnance agree to confiscate that' is the wordplay.
'endless' means to remove the last letter.
'german ordnance' becomes 'panzer' (German armoured unit).
'agree' becomes 'chime'.
'to confiscate that' is an insertion indicator.
'panzer' with its last letter taken away is 'panze'.
'panze' going into 'chime' is 'CHIMPANZEE'.
'with' acts as a link.
(Other definitions for chimpanzee that I've seen before include "MONKEY" , "African ape with advanced intelligence" , "Close relative of man" , "Intelligent ape" , "Primate" .)