Just say the word (7)
I believe the answer is:
mention
This might be a double definition.
'just say' is the first definition.
'mention' can be an answer for 'say' (mentioning is a kind of saying). I'm not certain of the 'just' bit.
'the word' is the second definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for mention that I've seen before include "state" , "Passing reference" , "Allude to" , "Briefly refer to (something)" , "Speak of - refer to" .)