Illegal drug at night gets daughter high (6)
I believe the answer is:
elated
'high' is the definition.
(similar in meaning)
'illegal drug at night gets daughter' is the wordplay.
'illegal drug' becomes 'E' (E can mean ecstasy).
'at night' becomes 'late' (I can't justify this - if you can you should give a lot more credence to this answer).
'gets' means one lot of letters go next to another.
'daughter' becomes 'd' (genealogical abbreviation).
'e'+'late'+'d'='ELATED'
Can you help me to learn more?
(Other definitions for elated that I've seen before include "Intensely delighted and proud" , "Exhilarated, highly excited" , "Overjoyed, happy and excited" , "Cock-a-hoop" , "Filled with joy and pride" .)