Susceptible to strong emotion in past maybe (7)
I believe the answer is:
intense
'susceptible to strong emotion' is the definition.
I can't judge whether this defines the answer.
'in past maybe' is the wordplay.
'past maybe' becomes 'tense' (past tense).
'in'+'tense'='INTENSE'
Can you help me to learn more?
(Other definitions for intense that I've seen before include "Acute, concentrated" , "Feverish" , "Great" , "Very concentrated or passionate" , "Deeply felt or vehement" .)