With Dale Stephens and Johnnie Jackson out for some time, experienced 31-year old central midfielder Daryl Russell has been brought in on loan. He has appeared just four times for the Lillywhites this season, but the move to Charlton has upset some of their fans: http://www.lep.co.uk/sport/football/pne_midfielder_joins_table_toppers_1_4001564
'Experienced' can be a synonym for 'journeyman', while 'engine room' can be another way of say 'energetic, but not very skilled' but one has to take what is available. Moreover, he had a good spell with Norwich City, playing a significant role in their promotion from League 1.
The Canaries received transfer bids of around half a million, but valued him then at £750,000. He left the club in 2010 after deciding not to accept a new contract he was offered.