Consume no end of acid drops (4)
I believe the answer is:
rain
'end of acid drops' is the definition.
'rain' can be an answer for 'drops' (drops of water). I am not sure about the 'end of acid' bit.
'consume no' is the wordplay.
'consume' becomes 'rai' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'no' becomes 'n' (common abbreviation).
'rai'+'n'='RAIN'
Can you help me to learn more?
(Other definitions for rain that I've seen before include "Fall wetly" , "Falling moisture" , "The ---, it ---eth every day (T.Night)" , "See 12" , "previous rule?" .)