Back from pyjama party in state of agitation (3)
I believe the answer is:
ado
'state of agitation' is the definition.
'ado' can be an answer for 'agitation' (I've seen this before). I am not certain of the 'state of' bit.
'back from pyjama party' is the wordplay.
'back from' indicates one should take the final letters (the letter at the back of the word).
'party' becomes 'do' (do can informally mean a party).
The last letter of 'pyjama' is 'a'.
'a'+'do'='ADO'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for ado that I've seen before include "hoo-hah" , "Fuss or bustle" , "Fuss, bother" , "Shakespeare: 'Much ... About Nothing'(3) ()" , "stir" .)