Able to stimulate old worker around City dumping yen (8)
I believe the answer is:
excitant
'able to stimulate' is the definition.
I can't tell whether this definition defines the answer.
'old worker around city dumping yen' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'worker' becomes 'ant' (worker is a type of ant).
'around' means one lot of letters goes inside another.
'dumping' is a deletion indicator.
'yen' becomes 'y' (resembles the symbol for the currency of Japan).
'city' with 'y' removed is 'cit'.
'ex'+'ant'='exant'
'exant' enclosing 'cit' is 'EXCITANT'.
Can you help me to learn more?
(Another definition for excitant that I've seen is " Stimulant".)