Wherein, experimentally, to have a little party? (3)
I believe the answer is:
lab
'party?' is the definition.
(abbreviation for Labour, UK political party)
'wherein experimentally to have a little' is the wordplay.
I cannot quite see how this works, but
'a' is within the answer.
'little' could be 'l' (abbreviation for little) and 'l' is found within the answer.
A single letter 'b' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for lab that I've seen before include "Scientists' workplace" , "Science room" , "Research workroom" , "In brief, a room for scientific experiments" , "Workplace for researcher" .)