Observations about what Germans used to spend (7)
I believe the answer is:
remarks
'observations' is the definition.
(I know this)
'about what germans used to spend' is the wordplay.
I cannot quite understand how this works, but
'about' could be 're' ('re' means regarding or about) and 're' is present in the answer.
The remaining letters 'marks' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for remarks that I've seen before include "See 14" , "Comments, observations" .)