Intense time being accommodated by former engineers (7)
I believe the answer is:
extreme
'intense' is the definition.
('extreme' can be similar in meaning to 'intense')
'time being accommodated by former engineers' is the wordplay.
'time' becomes 't'.
'being accommodated by' indicates putting letters inside.
'former' becomes 'ex'.
'engineers' becomes 'reme' (I've seen this in other clues).
'ex'+'reme'='exreme'
't' inserted into 'exreme' is 'EXTREME'.
(Other definitions for extreme that I've seen before include "lacking moderation" , "too much" , "Very great; not usual" , "Most distant" , "over the top" .)