Lion locks crew inside finally (4)
I believe the answer is:
mane
'lion locks' is the definition.
'mane' can be an answer for 'locks' (I've seen this in other clues). I am unsure of the 'lion' bit.
'crew inside finally' is the wordplay.
'crew' becomes 'man' (both can mean to staff or operate something).
'finally' suggests the final letters.
The last letter of 'inside' is 'e'.
'man'+'e'='MANE'
Can you help me to learn more?
(Other definitions for mane that I've seen before include "Neck hair of an animal" , "Long flowing hair" , "Animal neck-hair" , "Hair (of lion)" , "Lion or horse's 10 Across" .)