* I turn east of bridge (7)
I believe the answer is:
spandau
'i' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'turn east of bridge' is the wordplay.
I cannot really see how this works, but
'turn' could be 'u' (a 'U-turn' is a kind of turn) and 'u' is found in the answer.
'bridge' could be 'span' (synonyms) and 'span' is present in the answer.
The remaining letters 'da' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for spandau that I've seen before include "Rudolf Hess's prison" , "-- Ballet, pop group" , "cage in Berlin" , "British band, -- Ballet" , "Former Berlin prison" .)