Precarious seat inside upper chamber (5)

I believe the answer is:

perch

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'precarious seat' is the definition.
'perch' can be an answer for 'seat' (perch is a kind of seat). I am not sure about the 'precarious' bit.

'inside upper chamber' is the wordplay.
'inside' indicates the answer is hidden within the clue.
'PERCH' is hidden in the letters of 'upper chamber'.

Can you help me to learn more?

(Other definitions for perch that I've seen before include "Bird's resting place or old measure of length" , "Bird's roost" , "Settle" , "pew?" , "Roost; old measure" .)

I've seen this clue in The Independent.

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