Male dismissed after I see how big his charges are! (6)
I believe the answer is:
mahout
'big his charges are' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'male dismissed after i see' is the wordplay.
'male' becomes 'm' (common abbreviation).
'dismissed' becomes 'out' (I've seen this before).
'after' means one lot of letters go next to another.
'i see' becomes 'ah' (exclamation used to indicate understanding).
'out' after 'ah' is 'ahout'.
'm'+'ahout'='MAHOUT'
'how' is the link.
Can you help me to learn more?
(Other definitions for mahout that I've seen before include "Elephant keeper/driver" , "Person navigating Jumbo" , "Keeper and driver of elephants" , "Indian elephant driver" , "He looks after elephants in India" .)