Consider others, concealing muscle (7)
I believe the answer is:
respect
'consider' is the definition.
(I know that respect is a more specific form of consider)
'others concealing muscle' is the wordplay.
'others' becomes 'rest' (eg the rest of a group).
'concealing' indicates putting letters inside.
'muscle' becomes 'pec' (pectoral muscle).
'rest' going around 'pec' is 'RESPECT'.
(Other definitions for respect that I've seen before include "Spectre (anag.)" , "Point" , "Deference, obedience" , "to abide by" , "Venerate" .)