Having an irrational fear of mischievous imp in picture (6)
I believe the answer is:
phobic
'having an irrational fear' is the definition.
(I've seen this in another clue)
'mischievous imp in picture' is the wordplay.
'mischievous imp' becomes 'hob' (synonyms. I am not sure about the 'mischievous' bit.).
'in' is an insertion indicator.
'picture' becomes 'pic' (short for picture).
'hob' put inside 'pic' is 'PHOBIC'.
'of' is the link.
Can you help me to learn more?
(Other definitions for phobic that I've seen before include "With an irrational fear" , "Suffering irrational fears" , "suffering morbid fear" .)