Press for a bit more fervour generally (4)
I believe the answer is:
urge
'press for' is the definition.
(I've seen this in another clue)
'a bit more fervour generally' is the wordplay.
'a bit' says the answer is hidden in the clue (the answer is formed by a bit of the clue).
'URGE' is hidden within 'more fervour generally'.
(Other definitions for urge that I've seen before include "'Spur on, encourage (4)'" , "Strongly encourage" , "Impel, exhort" , "Propel, drive onward" , "Advise earnestly, spur" .)