Earn tons perhaps, getting rich (8)
I believe the answer is:
resonant
'rich' is the definition.
(thesaurus)
'earn tons perhaps' is the wordplay.
'perhaps' indicates an anagram.
'earn'+'tons'='earntons'
'earntons' with letters rearranged gives 'RESONANT'.
'getting' acts as a link.
(Other definitions for resonant that I've seen before include "Resounding, ringing" , "Like" , "Deeply sounding" , "Deep, clear and continuing to sound or reverberate" , "Booming" .)