Meagre try intermittently meeting resistance and torment (6)
I believe the answer is:
martyr
'torment' is the definition.
(martyring is a kind of tormenting)
'meagre try intermittently meeting resistance' is the wordplay.
'intermittently' indicates alternate letters.
'meeting' says to put letters next to each other.
'resistance' becomes 'r' (abbreviation).
'meagre'+'try'='meagretry'
The alternating letters of 'meagretry' are 'marty'.
'marty'+'r'='MARTYR'
'and' is the link.
(Other definitions for martyr that I've seen before include "Persecution victim" , "Person dying for a cause" , "One suffering or dying for a cause" , "One killed for their religious beliefs" , "Not regular" .)