Cold German and American spies coming in all out of sorts (7)
I believe the answer is:
glacial
'cold' is the definition.
(similar in meaning)
'german and american spies coming in all out of sorts' is the wordplay.
'german' becomes 'g' (abbreviation).
'and' means one lot of letters go next to another.
'american spies' becomes 'CIA' (Central Intelligence Agency).
'coming in' means one lot of letters goes inside another.
'out of sorts' is an anagram indicator (not its usual self).
'all' anagrammed gives 'lal'.
'cia' placed inside 'lal' is 'lacial'.
'g'+'lacial'='GLACIAL'
(Other definitions for glacial that I've seen before include "Of slow moving ice masses" , "Extremely cold" , "Pertaining to the ice ages" , "Cold and icy" , "Ice cold" .)