In short, believe it's been grazed as it's very sensitive (4-7)
I believe the answer is:
thin-skinned
'sensitive' is the definition.
(I've seen this before)
'in short believe it's been grazed as it's' is the wordplay.
I cannot really understand how this works, but
'in' is present in the answer.
'as' could be 'in' (I've seen this in other clues) and 'in' is found in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is present in the answer.
This explanation may well be incorrect...
'very' acts as a link.
Can you help me to learn more?
(Other definitions for thin-skinned that I've seen before include "Irritable" , "Easily offended" , "Quick to take offence" .)