Maybe steely marine’s outside, of great stature and in charge (8)
I believe the answer is:
metallic
'maybe steely' is the definition.
I can't judge whether this defines the answer.
'marine's outside of great stature and in charge' is the wordplay.
'outside' says to hollow out the word (remove centre letters).
'of great stature' becomes 'tall' (I've seen this before).
'and' says to put letters next to each other.
'in charge' becomes 'ic' (abbreviation for 'in charge').
'marine' with its centre removed is 'me'.
'me'+'tall'+'ic'='METALLIC'
Can you help me to learn more?
(Other definitions for metallic that I've seen before include "sound of a bell?" , "Like good conductor" , "Like iron, gold, etc" , "Relating to a lustrous elementary substance" , "This car paint say, gives a shiny surface" .)