Busybody concerned with offspring turning up (5)
I believe the answer is:
noser
'busybody' is the definition.
(I've seen this before)
'concerned with offspring turning up' is the wordplay.
'concerned with' becomes 're' (re can mean regarding, concerning).
'offspring' becomes 'son' (male offspring).
'turning up' is a reversal indicator.
're'+'son'='reson'
'reson' in reverse letter order is 'NOSER'.
(Other definitions for noser that I've seen before include "strong rebuff" , "strong headwind" , "busybody" , "curious one" , "Severe rebuff" .)