Royal, mostly odd, however, deprived of love (7)
I believe the answer is:
queenly
'royal' is the definition.
(thesaurus)
'mostly odd however deprived of love' is the wordplay.
'mostly' means to remove the last letter (most but not all of the word).
'odd' becomes 'queer' (I've seen this in another clue).
'however deprived of love' becomes 'nly' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'queer' with its last letter removed is 'quee'.
'quee'+'nly'='QUEENLY'
Can you help me to learn more?
(Other definitions for queenly that I've seen before include "Regal" , "As monarch" , "Like Nefertiti" , "Like Her Majesty?" .)