First of my devious clues shows strength (6)
I believe the answer is:
muscle
'strength' is the definition.
(muscle can mean strength or force)
'first of my devious clues' is the wordplay.
'first of my' becomes 'm' (1st letter of 'my').
'devious' indicates an anagram.
'clues' with letters rearranged gives 'uscle'.
'm'+'uscle'='MUSCLE'
'shows' is the link.
(Other definitions for muscle that I've seen before include "Eg, biceps" , "One of the contractile organs of the body" , "Force; a body tissue" , "It can contract in the body" , "Fibrous bodily tissue for strength" .)