Power oared boat using mass for energy (5)
I believe the answer is:
might
This clue could be a double definition.
'power oared boat' is the first definition.
'might' can be an answer for 'power' (I've seen this before). I'm unsure of the 'oared boat' bit.
'mass for energy' is the second definition.
'might' can be an answer for 'energy' (thesaurus). I am not sure about the 'mass for' bit.
'using' acts as a link.
Can you help me to learn more?
(Other definitions for might that I've seen before include "Physical strength of old" , "- - and main" , "May, in the past" , "Great power/strength" , "Strength - could possibly" .)