Backing man and daughter to crack cryptic clues, going slowly (6,8)

'going slowly' is the definition.
(behind schedule means running late or being slow)

'backing man' is the wordplay.
'backing' becomes 'behind' (I've seen this before).
'man' becomes 'schedule' (I can't justify this - if you can you should give a lot more credence to this answer).
'behind'+'schedule'='BEHIND SCHEDULE'

'and daughter to crack cryptic clues' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.