I posed suitably in balance (6)
I believe the answer is:
poised
'posed suitably in balance' is the definition.
'poised' can be an answer for 'posed' (poising is a kind of posing). I'm unsure of the 'suitably in balance' bit.
'i' is the wordplay.
I cannot really see how this works, but
'i' is found in the answer.
The remaining letters 'posed' 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 poised that I've seen before include "Balanced or braced" , "Composed and elegant" , "Self-assured or ready to strike" , "Composed and self-assured" , "Showing self-assurance" .)