Ambassador in front of court with one Conservative, very busy (6)
I believe the answer is:
hectic
'very busy' is the definition.
(I've seen this before)
'ambassador in front of court with one conservative' is the wordplay.
'ambassador' becomes 'HE' (His or Her Excellency).
'in front of' says to put letters next to each other (some letters go in front of others).
'court' becomes 'ct' (abbreviation used in road names).
'with one' becomes 'i' (Roman numeral. I am not sure about the 'with' bit.).
'conservative' becomes 'C' (UK political abbreviation).
'he'+'ct'+'i'+'c'='HECTIC'
Can you help me to learn more?
(Other definitions for hectic that I've seen before include "Frantically busy" , "Involving feverish activity, flushed" , "Frantically active" , "particularly busy" , "Furious" .)