Hire and film in bad weather (6)
I believe the answer is:
retain
'hire' is the definition.
(retaining is a kind of hiring)
'film in bad weather' is the wordplay.
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'in' indicates putting letters inside.
'bad weather' becomes 'rain' (rain is an example of bad weather).
'et' going within 'rain' is 'RETAIN'.
'and' is the link.
(Other definitions for retain that I've seen before include "Hold onto" , "Continue to hold on to" , "Keep, hold on to something" , "Hold on to or employ counsel" , "'Hold, keep back (6)'" .)