Too much talk of taking aspirin (3)
I believe the answer is:
gas
'too much talk' is the definition.
'gas' can be an answer for 'talk' (gas can mean to chat). I am not sure about the 'too much' bit.
'of taking aspirin' is the wordplay.
'of' indicates the answer is hidden within the clue.
'GAS' is hidden within 'taking aspirin'.
Can you help me to learn more?
(Other definitions for gas that I've seen before include "may fill American car" , "Talk idly; fuel" , "Eg, oxygen" , "Petrol (US)" , "Oxygen is one" .)