Raucous cry of a member of parliament? (4)
I believe the answer is:
hoot
'raucous cry' is the definition.
(I've seen this before)
'of a member of parliament?' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is present in the answer.
The remaining letters 'hot' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for hoot that I've seen before include "Sound of owl" , "noise made by 7 [WOOD-OWL]" , "Warning sound - something not given by the careless!" , "Funny thing (informal);bird call" , "On (a ship/train/plane)" .)