Bad feeling, seeing the enemy number in here (12)
I believe the answer is:
presentiment
'bad feeling' is the definition.
(I've seen this before)
'the enemy number in here' is the wordplay.
'the enemy' becomes 'time' (reference to the phrase 'time is the enemy').
'number' becomes 'n'.
'in' indicates putting letters inside.
'here' becomes 'present' (similar in meaning).
'time'+'n'='timen'
'timen' inserted inside 'present' is 'PRESENTIMENT'.
'seeing' is the link.
(Other definitions for presentiment that I've seen before include "An intuitive feeling" , "Intuitive foreboding" , "bad feeling" , "Feeling of apprehension" .)