A drop of tea – right? (4)
I believe the answer is:
tear
'a drop' is the definition.
(I've seen this before)
'tea right?' is the wordplay.
'tea' becomes 't' (I've seen this in other clues).
'right?' becomes 'ear' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
't'+'ear'='TEAR'
'of' is the link.
Can you help me to learn more?
(Other definitions for tear that I've seen before include "Rush - to pull apart" , "Shred" , "Rate (anag.)" , "Split - career" , "Product of the lachrymal gland" .)