Like certain exercises with a crashing bore in charge (7)
I believe the answer is:
aerobic
'like certain exercises' is the definition.
(aerobic exercise is a type of exercise)
'a crashing bore in charge' is the wordplay.
'crashing' indicates anagramming the letters.
'in charge' becomes 'ic' (abbreviation for 'in charge').
'bore' anagrammed gives 'erob'.
'a'+'erob'+'ic'='AEROBIC'
'with' acts as a link.
(Other definitions for aerobic that I've seen before include "(Of exercise) increasing oxygen in blood" , "Involving or requiring oxygen" , "Type of exercise" , "(Of exercises) related to increasing oxygen in blood" , "dependent on oxygen" .)