Reduce the price of squash (7)
I believe the answer is:
depress
'reduce' is the definition.
(thesaurus)
'the price of squash' is the wordplay.
'the price of' becomes 'de' (I am not sure about this - if you are sure you should believe this answer much more).
'squash' becomes 'press' (I've seen this in other clues).
'de'+'press'='DEPRESS'
Can you help me to learn more?
(Other definitions for depress that I've seen before include "Push, get, down" , "Put dent in or make dismal" , "Make dejected" , "Make sad or gloomy" , "Cause to feel dispirited" .)