Be a dear and find a little drop (4)
I believe the answer is:
bead
'a little drop' is the definition.
'bead' can be an answer for 'drop' (synonyms). I'm unsure of the 'a little' bit.
'be a dear' is the wordplay.
'dear' becomes 'd' (this might be a standard abbreviation which I don't know about).
'be'+'a'+'d'='BEAD'
'and find' is the link.
Can you help me to learn more?
(Other definitions for bead that I've seen before include "Drop of moisture; holed piece of glass" , "A bit of the rosary" , "Drop of liquid on a surface" , "Bauble" , "Round piece of glass, etc" .)