I am after companion with time for wild unrealistic dream (7)
I believe the answer is:
chimera
'wild unrealistic dream' is the definition.
'chimera' can be an answer for 'dream' (I have seen 'wild dream' mean 'chimera' so perhaps 'dream' could also mean 'chimera'). I'm not certain of the 'wild unrealistic' bit.
'i am after companion with time' is the wordplay.
'i am' becomes 'I'm' (contraction).
'after' means one lot of letters go next to another.
'companion' becomes 'ch' (Companion of Honour).
'with' means one lot of letters go next to another.
'time' becomes 'era' (era is a kind of time).
'im' after 'ch' is 'chim'.
'chim'+'era'='CHIMERA'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for chimera that I've seen before include "Illusory aim; monster" , "phantom" , "Lion-headed monster" , "Mythological animal; something illusory" , "Creature such as a gryphon" .)