Again employed trick, taking in Spain and Germany (6)
I believe the answer is:
reused
'again employed' is the definition.
('used' can be a synonym for 'employed' so perhaps 'reused' is OK for 'again employed')
'trick taking in spain and germany' is the wordplay.
'trick' becomes 'ruse' (I've seen this before).
'taking in' is an insertion indicator.
'spain' becomes 'e' (abbreviation for Espana).
'and' says to put letters next to each other.
'germany' becomes 'd' (international vehicle registration code).
'ruse' enclosing 'e' is 'reuse'.
'reuse'+'d'='REUSED'
(Another definition for reused that I've seen is " Recycled".)