Power of faceless men, queen and heartless guy (6)
I believe the answer is:
energy
'power' is the definition.
(synonyms)
'faceless men queen and heartless guy' is the wordplay.
'faceless' means to remove the first letter.
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'and' is a charade indicator (letters next to each other).
'heartless' says to hollow out the word (remove centre letters).
'guy' with its centre taken out is 'gy'.
'men' with its first letter taken away is 'en'.
'en'+'er'+'gy'='ENERGY'
'of' is the link.
(Other definitions for energy that I've seen before include "Strength, vitality" , "Go, zip" , "Vigour, animation" , "Power; capacity for work" , "Capacity for action" .)